Malicious PDF — malware analysis report

Static analysis result for SHA-256 472f5deddb36f1ab…

MALICIOUS

PDF

95.6 KB Created: 2021-08-06 16:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6141f8631066acf2718d06dbc736622d SHA-1: 5de937d66eca8ab87e3d098b3566f33b7daecb17 SHA-256: 472f5deddb36f1ab055c8c46183a34882905c4cee92b35853a7ef0219927777c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://morethancars.nl/uploads/edytor/file/93489693633.pdf In PDF document text
    • http://altelaw.com/uploads/image/file/84104647062.pdfIn PDF document text
    • http://nktrading.qa/file/files/fijavejemakutigiviget.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/16910040735.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/mamawidetolugivakel.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/62440531320.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/32b2dc02de6752fefa06ad8c52c712a0/fimomizoluluninav.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/gazifugiwitusagapepeven.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/beponibefejaparamenevene.pdfIn PDF document text
    • http://mhspartan79.com/clients/9/97/97d0d0788ec4d6723ba7be3cd58769e3/File/80514227043.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/12962666262.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a810703f5f---movudazutatowimuwefewuxi.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/rugabo.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/6e4ebfdd252a24602616ecf3dacf1ab4/54937127020.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/ad2e742ebb1adce34302ccd827efa562/94578697822.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/1pbp72n6r5kb2ot9huvn7cvl64/81484395051.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/eaa7e85a2e956cb976a2b5a603f1a102/pisiwivezikex.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/16639646574.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210510051531210.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vk8jlea4oavq6b52jjnbd00pl3/katazakupobadane.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4882bde2d---29514824116.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/slprtagse2f6bo76t6be4d5374/54854810705.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/83337826734.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=herbert+caesari+50+vocalises+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C2 18132 bytes
SHA-256: 5646ef310bd4389807178cd95a249474862aa6d3d8e8c9fccaf45dd7afa93157
font_01_sfnt_off00011365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11365 13512 bytes
SHA-256: 6981fd3a9a9bbf245d498f552245ee123cd9e69b7971c399c60e899b0868dfa6
font_02_sfnt_off00013ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15604 10960 bytes
SHA-256: c33861c058b8993466926d7c9fdbe10b92e4744fa3a3110f89f67f4877a995d2

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