Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6f8d0ffd13e842…

MALICIOUS

PDF

81.7 KB Created: 2021-08-01 18:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a978948769a9e9f7c3f4870f1f6d4bf5 SHA-1: c7532efc7c6f7b6ce7c62f83d03e3e355190a704 SHA-256: 7e6f8d0ffd13e842e87d5ae3d579ae2b9543b160218d6b0a302142dcc28ad549
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, several of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://dainindo.com/Uploads/userfiles/files/mokamewifedawunofezo.pdf In PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721a40a1819---lixasudefijopadituxalupaj.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/9066150003.pdfIn PDF document text
    • http://zae.me/datafiles/file/4315241665.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/pukunad.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/86662293488.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160929018008fe---17226159555.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbd5730377---15834598025.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/ladav.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/59677404217.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/vexute.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/pafisixipukitelatedijovow.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083b2d58c799---88356432235.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823f5d6bdfa---xojonenaledatafo.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/96638852353.pdfIn PDF document text
    • http://khotelmarket.com/FileData/ckfinder/files/20210621_FFD48BD95B89393F.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/39394cfee2a56940636b05c361f8be95/zebuxemabetupewewuradi.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/sofiwumoralureranedarujeb.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a61d43762a6---gofuxezes.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/5cc01e395204e4373cc5eac6c36f6f3f/89407123428.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a76b0ca33---wobujawifolelejawo.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090f966dbcdc---bevufeluvasowugi.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/8ee92c73dcf47714641551979c343213/godexolozibu.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/7l29i2b5b8odgjlahv27isgcj0/nusabixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=generador+restas+llevando+para+imprimirPDF 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_off0000d906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD906 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF118 17428 bytes
SHA-256: 1838ba44f4a9d3e9e7a73830834041635ea5f7f989bbb61227741c7053acd5b0
font_02_sfnt_off00011d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D67 10660 bytes
SHA-256: a27c434aa5ceef39b69ba8e270eb453d462fa5f4e0afa21fddbebebefbab02c3

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