Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2c6a3eede593b6…

MALICIOUS

PDF

140.6 KB Created: 2021-02-18 15:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1e88aa19aeb33fef09a20a69d244a3ae SHA-1: 2b7585fb6cb3fda7ac2464c205a4ede50f00cd66 SHA-256: 6d2c6a3eede593b6b1dbf223b8567fc162fce091e0544a61cbf04775f06fdb30
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious content delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/wb?keyword=liftmaster%20p3%20security+%202.0%20manual%207675 PDF link annotation
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/2352585.pdfIn PDF document text
    • https://buvekidi.weebly.com/uploads/1/3/0/7/130775196/55c43.pdfIn PDF document text
    • http://my-favshopc.online/diamond_clicker_appzf0he.pdfIn PDF document text
    • https://xazepobuzu.weebly.com/uploads/1/3/4/5/134582826/xivefoxe-tifilorofa-salorizi.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/ghehjUY/exploration_definition_and_pronunciation_of_quay.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/EOTifgg/dean_ornish_reversing_heart_disease_study.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/jgdgfhf/56217116076.pdfIn PDF document text
    • http://timurberg.ru/kavetenorenlfw3.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/gj7hfjg/usa_today_subscription_student_discount.pdfIn PDF document text
    • http://criticcxck.space/setabomutifogipup0osbo.pdfIn PDF document text
    • http://9gusevshop.space/gikepind6bz9.pdfIn PDF document text
    • https://venubitolaxi.weebly.com/uploads/1/3/4/3/134372432/modewotiwodogefu.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/gipofofogozetuwunapev8nil.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/cibhcid/bimogoluwubume.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/hbCO85D/46392000845.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/california_dmv_written_test_cheat_sheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/73015958263.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/natavoxawijaliz.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/30991767530.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off0001d07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D07F 6032 bytes
SHA-256: 44a2d169ea0cbff8b6b3c86e51ed28367a4958f0b89c25cb1829972ae8e97af2
font_01_sfnt_off0001e509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E509 12472 bytes
SHA-256: 8356847314b13672b8e05d91949ecd8cc6b7904c710295ceff55c06c00432256
font_02_sfnt_off00020dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20DBD 16088 bytes
SHA-256: 1a03e4e91662a56700a75a1b9e8db9e0142c4e26e1a3a960fa6135405e2c29f9

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