Malicious PDF — malware analysis report

Static analysis result for SHA-256 465201390c3f35b5…

MALICIOUS

PDF

83.2 KB Created: 2021-02-10 13:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 537b347cf82c3d4159c90f619747614e SHA-1: 2de1a3ab01df00808ca3feca6d6a1f740643a356 SHA-256: 465201390c3f35b5cf41c0afc6aaf09f7bfbb0f7bbafe7572b59d132a7724b46
146 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm on disposable hosting and a callback phishing lure. The document body, though truncated, contains text related to 'Rate confirmation template' and 'wkhtmltopdf', suggesting a deceptive pretext. While no scripts were explicitly extracted, the PDF structure and associated URLs point towards a phishing or scam attempt, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://seumenha.ru/123?utm_term=rate+confirmation+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370985/normal_5feafa60c82bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425738/normal_600819d251627.pdfIn PDF document text
    • http://smartcreditcheck.info/62228868463ha4ex.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/augjhhX/parufizirawuxibibafe.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/nhimhDs/kotaxokipaxopalako.pdfIn PDF document text
    • http://akfb.online/80380400847ogaka.pdfIn PDF document text
    • http://vinnipoh.fun/cheat_codes_for_midnight_clubcckbd.pdfIn PDF document text
    • http://idealica-itufficiale.website/deming_philosophy_in_tqmmfd0l.pdfIn PDF document text
    • https://cdn.sqhk.co/xororasomig/baiiCji/natural_forest_hd_images.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/27Mjagj/59773730453.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxonavi/hhiijhC/cold_war_beta_release_date_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/nosamese/qa70gc6/wheel_of_fortune_free_play_apk_download.pdfIn PDF document text
    • http://simultaneously.space/15729205212eq7ro.pdfIn PDF document text
    • http://stebsmeh.space/black_beauty_trailer_espanolrigyw.pdfIn PDF document text
    • https://cdn.sqhk.co/gasawivu/1msGgiv/cartoon_run_3d_run_cartoon_runtime.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/hRhjgjR/huey_magoos_apopka_menu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bapomel.epizy.com/79722328791.pdfIn PDF document text
    • http://sisawujeza.rf.gd/tofomunozibewe.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/pitarizox.pdfIn PDF document text
    • http://kubazemaxem.epizy.com/63700802655.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001073c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 4988 bytes
SHA-256: 7c61afc29e630976a718b76a1fa28771a661b161279ece0d20b356f913a2b7c1
font_01_sfnt_off0001182a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182A 11452 bytes
SHA-256: 5034f5412a20b3ca5304750ef964480e404b659322e2eea1268ec3866ef6a77d

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