Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c7288f13596d61…

MALICIOUS

PDF

74.3 KB Created: 2021-03-29 22:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f60c474f8c16fa90d584b4933440e87 SHA-1: d7f1ce27233e3bdbbd48f9002e144fe0e30642f1 SHA-256: 48c7288f13596d615a76ac2ced4e564522769ab7643f6400c1603ab5030e3383
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files hosted on Weebly and other platforms, indicative of a link farm or phishing campaign. The presence of a URL related to 'reset chrome settings android phone' suggests a social engineering lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/123?utm_term=reset+chrome+settings+android+phone
    • https://vexojuvij.weebly.com/uploads/1/3/4/3/134345090/3514899.pdf
    • https://nitavadokeja.weebly.com/uploads/1/3/1/1/131163909/8974815.pdf
    • https://cdn-cms.f-static.net/uploads/4416661/normal_60445a1dbd47b.pdf
    • https://static.s123-cdn-static.com/uploads/4476936/normal_5fe347a284712.pdf
    • https://cdn-cms.f-static.net/uploads/4454426/normal_604ccd956d96e.pdf
    • https://static.s123-cdn-static.com/uploads/4458633/normal_6008c880404cd.pdf
    • https://degadita.weebly.com/uploads/1/3/5/9/135965793/bunimaxopora.pdf
    • http://paxezot.getenjoyment.net/adobe_premiere_pro_wedding_templates_free_download.pdf
    • https://cdn-cms.f-static.net/uploads/4483623/normal_60293ccf420bb.pdf
    • http://xemizawufogutuf.scienceontheweb.net/why_is_my_beats_microphone_not_working.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rubidokezive/pokemon_deluxe_essential_handbook.pdf
    • https://s3.amazonaws.com/kulinisokakewi/math_worksheets_grade_1_multiplication.pdf
    • https://s3.amazonaws.com/tikoweravisixu/advisorshares_vice_etf_fact_sheet.pdf
    • https://s3.amazonaws.com/kegovev/dragonfly_maze_answer.pdf
    • https://s3.amazonaws.com/fadadedezeker/xuwazowitokajadofa.pdf
    • https://s3.amazonaws.com/debiwelof/java_programming_basics.pdf
    • https://s3.amazonaws.com/sogovekevi/butefinanoj.pdf
    • https://s3.amazonaws.com/faxaxos/beleefdheidsformule_franse_brief.pdf
    • https://s3.amazonaws.com/sepovutapakogaf/73765094516.pdf
    • https://s3.amazonaws.com/jefobexapulow/2021_calendar_with_indian_holidays.pdf
    • https://s3.amazonaws.com/wekibik/metformin_er_500_mg_images.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e43b.bin
75cefe6f55e6dc071adf02674bfda75f38879363f45b26b1d8352ce5ea2fb849		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE43B 5460 bytes
font_01_sfnt_off0000f6a8.bin
c1816074c311261087594e39bd4d8edef3566d5d77b268449b2f2f58abbbea9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 10488 bytes

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