Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ae72941007ee0e…

MALICIOUS

PDF

116.1 KB Created: 2021-03-29 04:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b408cf73f26fe658617452b33c64f768 SHA-1: ed62c29072a6408b30a9dd95a907e9c95cc33672 SHA-256: c3ae72941007ee0e28e2ea809ea1c3a3cfd80473e5501cc2338fdc734193cd83
206 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to various websites, one of which is associated with malware distribution. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document's structure and the embedded URLs suggest an attempt to exploit search engine optimization techniques to lure unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • 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://vilenefex.ru/wix?keyword=yu+gi+oh+bam+apk+mod PDF link annotation
    • https://woteginawewe.weebly.com/uploads/1/3/1/3/131379999/tiramita-wegiw-mifesubakej.pdfIn PDF document text
    • https://domazatavaxagit.weebly.com/uploads/1/3/0/7/130775902/681754.pdfIn PDF document text
    • http://kevarusakoko.mypressonline.com/violin_scales_and_arpeggios_grades_6_8.pdfIn PDF document text
    • https://simebusuf.weebly.com/uploads/1/3/1/4/131406507/e2b9f4444b1640.pdfIn PDF document text
    • https://lugarulanug.weebly.com/uploads/1/3/5/3/135383187/1692c8.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/renaxazilazifosozuk.pdfIn PDF document text
    • http://gewusoluxul.scienceontheweb.net/86286961499.pdfIn PDF document text
    • https://getawupib.weebly.com/uploads/1/3/1/8/131856556/1932313.pdfIn PDF document text
    • https://kokonasaza.weebly.com/uploads/1/3/1/6/131636703/cb9092bc3.pdfIn PDF document text
    • https://dukuvurijo.weebly.com/uploads/1/3/4/5/134522813/590729.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/kelozovi_jedijopibetozir_xewobisar.pdfIn PDF document text
    • https://wadazujirala.weebly.com/uploads/1/3/4/5/134596454/9086742.pdfIn PDF document text
    • https://xizimojagetotom.weebly.com/uploads/1/3/3/9/133997363/1440739.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_37193d8fdd6b450eb3c4cee84f9ff05f.pdf?index=trueIn PDF document text
    • http://lomemamimabow.rf.gd/68008885129.pdfIn PDF document text
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_c27fa1c191a64b8da221a0aef35017d6.pdf?index=trueIn PDF document text
    • http://fosufikitovirir.rf.gd/pogurepo.pdfIn PDF document text
    • http://nifusotajezunur.atwebpages.com/college_essay_writing.pdfIn PDF document text
    • http://dofumuligo.rf.gd/search_for_google_play_games.pdfIn PDF document text
    • http://jevusox.epizy.com/lafiwokefotexopek.pdfIn PDF document text
    • http://vajifotikidigi.rf.gd/can_you_change_to_word_document.pdfIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_6b86e1ccf6fe4f2d86db5a40162b31b8.pdf?index=trueIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14310 3036 bytes
SHA-256: e54566de27d033ac189d90678b2b2a116e976b6edee9f3ed336dd1ba6c4e8e89
font_01_sfnt_off00014dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCE 5232 bytes
SHA-256: d72c4af34c5a31c45227589264988bef0be0105ff8511edbd3d17ee40ea61ad6
font_02_sfnt_off00015f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F71 5752 bytes
SHA-256: 942d1c38c927c0430b00b4c4cfcb3fbe4040cd08f57a813dd9d6cd5dcb9e224b
font_03_sfnt_off00017387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17387 23336 bytes
SHA-256: f48560fb88e5974e9adde58bc58df5b5347d91ccd553a237c8dee1891bdbb46f
font_04_sfnt_off0001aaa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAA6 16780 bytes
SHA-256: c10165f0870e4a8689759f40b55cbcf5a10f02d9c95da598d7db905cff62e16a

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