Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7c1482150029c1…

MALICIOUS

PDF

95.9 KB Created: 2021-07-30 01:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1bd7fcfca3d0635d94ff1f40fb53d4d6 SHA-1: 6f86bf56027349695a5bfdd5231eda583bb7f945 SHA-256: de7c1482150029c1d4651923947da0322c1734132beab5b47e25dd4cee6a9448
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress installations and disposable domains, forming a link farm. The primary purpose appears to be directing users to potentially malicious second-stage content, such as phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9637

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/34b0f3e40546f036d780dd410fe9d6b3/49687840221.pdf In PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/eaaaefcecdffa075d4fe4ce0026ea350/96409319921.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/44902465137.pdfIn PDF document text
    • http://zuche0551.com/upload/file/rekoduvuzotuwaseg.pdfIn PDF document text
    • http://aweibel.com/Photo/file/pigov.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/menawud.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/zuximudirarabumegiza.pdfIn PDF document text
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/topofajefudejibuj.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9cde6a3c5---57481299737.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/dipudavetur.pdfIn PDF document text
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/62009755948.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8580d872db---17690517745.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/60356660255.pdfIn PDF document text
    • http://cci100.com/clients/57496/File/vaminidejubo.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/sutujawopem.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/37c8acf414a5f5b5d6ff96af84107461/kutegafo.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd961bcac77---38511991311.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d042ecf99---zuwikaxobe.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/44611528088.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0dbda4b77---kulewafetokimezu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738af715dc4---79885999448.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/7ecfd2d54aa2f760bc8917fef394b384/zogodojulo.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/5vltamm9seeropo3q8driqnqhv/22364308895.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/k0lai9qvo7fsibt15jl42lehe2/84369575971.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcfbe02e0b---26734540633.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/cce4eb1da38fda0a4c6ea61a752b5899/67277234016.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=is+twilight+midnight+sun+a+moviePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D0 10800 bytes
SHA-256: 3ef9290ec80c188c30e5135186940be01f39af89e71d0849b0e6398baa349d37
font_01_sfnt_off00010a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A54 16476 bytes
SHA-256: 5473cc5ab8d9fe9e88f9a49cbd8b6f59dc0a320e35d8d5e5c3853879cae1af18
font_02_sfnt_off0001210c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210C 1696 bytes
SHA-256: 0a4f45ca35490f1796084ea6d97ca1a4a36387197472668db154df97085ea45b
font_03_sfnt_off00012926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12926 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00014138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14138 17976 bytes
SHA-256: 394db38fa82f7dc7d5a8061cd803139937487092ec5d135191ab3e19dfe598ba