Malicious PDF — malware analysis report

Static analysis result for SHA-256 0603863239d4a4fd…

MALICIOUS

PDF

72.7 KB Created: 2020-12-14 21:34:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1ddbf4102a600c4abb05b38bcdffe59d SHA-1: e6537f523617c643ca7a43b3abadec2bf55e766e SHA-256: 0603863239d4a4fd18afabe42df99e164c1cdf25b04c9c8abc31bd6eac4940a7
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. The 'SE_CALLBACK_LURE' heuristic indicates the document may prompt users to call a number, a common tactic in phishing and tech support scams. While no scripts were extracted, the presence of many external links and the ML classifier's high confidence score point towards malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffine.ru/aws?utm_term=canva+cv+template+gratuit PDF link annotation
    • https://tivurenufetoza.weebly.com/uploads/1/3/4/2/134235987/2930036.pdfIn PDF document text
    • https://jujoxiro.weebly.com/uploads/1/3/4/8/134875196/sufudad-keketo-gotutalis-roburukunezubo.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/lokajafuwizonidun.pdfIn PDF document text
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/6ef67.pdfIn PDF document text
    • https://gimalijuvilonur.weebly.com/uploads/1/3/4/6/134619020/sepelepoziteni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc0c66b27a199023ab4af32/t/5fc573bd61e25426e1f0a124/1606775742080/percussion_plus_drum_set_blue.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d691a13a450babf3b7c7/t/5fc4fd54145a8629dc4d8278/1606745428976/viking_manual_5_speed_hand_mixer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a9a424b06a7eb327d53d/t/5fd64e81ffab5d3c56f760de/1607880322260/29748598704.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b266bda9c57a97e6b58e/t/5fce184a5177ea328cea329b/1607342154780/wowif.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6585cb3e0f57714784de/1606378886385/ziarat_e_ashura_in_urdu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a834abaecd33182d7d6c/t/5fce10acd336b863f0e90490/1607340204985/73600982165.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd13d0b24ece27e9134231/1606226902295/321336452.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79084633934501854b92a/t/5fd6828b72b1137fa97b2a85/1607893644412/63082218697.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ebc9085bf90c0efd2d89/t/5fccede55177ea328cc308d4/1607265765614/dragon_castle_board_game_expansion.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d38e5687f52b6b8dad8d/t/5fc3fa5a3570fb44d17e2545/1606679131517/which_of_the_following_presumptions_is_least_likely_to_relate_to_the_reliability_of_audit_evidence.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58f801452f90b7f04b470/t/5fccec340ab5d62febf2f333/1607265333024/bevabiregobokem.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27B 4932 bytes
SHA-256: a36c683688958f7666748fb96a215ad2dd886cedae6b446f857af6d2e5a998eb
font_01_sfnt_off0000e334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE334 10620 bytes
SHA-256: c47eb6485122bc654bafaed2d50aea9f86610a89e88d43b27aca73772a5fae41
font_02_sfnt_off00010759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10759 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176