Malicious PDF — malware analysis report

Static analysis result for SHA-256 158a3b1b6b6bb243…

MALICIOUS

PDF

90.0 KB Created: 2021-07-23 08:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5dd127c433624b096385ce4e88e33854 SHA-1: a97b7434a97c1a17ed378c1986704c784c0f20b2 SHA-256: 158a3b1b6b6bb243a57c27ca82df145693da1fe8da74f708807d7663b8c85cb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous unknown URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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 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://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6bbec410fd---64941761921.pdf In PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/qkcfaj9spn8qu8roo4hn1b18ap/77954361425.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/welomofotuxilapitarutoluz.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/6293709444.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/2628485230.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b315d8da619---wixoduzulivefosug.pdfIn PDF document text
    • https://ovth.ch/userfiles/files/10850406819.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/21542680729.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/zebudoxenawaniwizoxolotod.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/42770320263.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/a11746c09be8e7e2392445914fce5347/rukiwofo.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/dubuton.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/7ac6e451f2898a907a3f5f1d286c1455/zizorapenodogaza.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/72122940239.pdfIn PDF document text
    • https://shunnasato.com/gizezavojuburex.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160868c23c8d46---88763305556.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/ip8oj42c69254belvk3u8jf6lb/logidome.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/c7ea900c92495c1f34c7f08da73aef88/91107101215.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/vuvejed.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/gooae32gmno6bdrj24qtafgakh/tejozudezit.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/34488018023.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/83867587135.pdfIn PDF document text
    • http://builderall.info/userfiles/file/norupexudojedovolalaj.pdfIn PDF document text
    • http://qzgj.cn/upload/file/65088911643.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779fff95a98---49957642756.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0294ae8ee---69556512716.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=fte+for+ppp+loanPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 17844 bytes
SHA-256: 3ee84f33338d2b95a8fb92c9a8c83da35c0d683881ffdb4005a5c25e13b60b52
font_01_sfnt_off00012af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF4 10068 bytes
SHA-256: 09c929254a0a11bb29338893206c039e1c0a305b741790abb89b21d4073d84c8
font_02_sfnt_off00014179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14179 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.