Malicious PDF — malware analysis report

Static analysis result for SHA-256 57179987f7077ec6…

MALICIOUS

PDF

107.9 KB Created: 2021-03-17 01:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c97628efa5c863ccd5943f47c1a5969 SHA-1: 3680215921863b7fa2f26784f38439596e12c56b SHA-256: 57179987f7077ec6506c6ab3bffb0df031b41cb99eb44d1677d6595374e7c447
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URL, 'https://mezovuduw.ru/award?keyword=mecanismo+de+accion+de+los+antifungicos+pdf', suggests a lure related to antifungal mechanisms, likely to deceive users into clicking. ClamAV detection and ML classification confirm its malicious nature, pointing towards phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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/award?keyword=mecanismo+de+accion+de+los+antifungicos+pdf
    • http://afracheat5.xyz/mewutu7szip.pdf
    • http://barashik.space/90243720719xm5hh.pdf
    • http://zubiki.top/factory_building_design7yjxl.pdf
    • http://rerikadarax.iblogger.org/bond_indenture_covenants_balance_sheet.pdf
    • http://uchebnoe.website/52321784382qx1uh.pdf
    • http://terem.space/superconscious_mind_powera9q9t.pdf
    • http://scarcebook.com/what_does_quantum_shift_meanq01b8.pdf
    • http://submonster.xyz/the_prayer_of_twenty_millionsey55c.pdf
    • http://padaxopawudu.iblogger.org/31611757540.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/farowug/luwuwugedareve.pdf
    • https://c4647614-9ff8-4b00-b819-08dc938bd166.filesusr.com/ugd/5d3f24_e46a813d688242a483384e0a8b57f05d.pdf?index=true
    • https://s3.amazonaws.com/panalipolifod/sevol.pdf
    • https://s3.amazonaws.com/jinabisura/zapupisubedediz.pdf
    • https://s3.amazonaws.com/wemofodi/70884024400.pdf
    • https://s3.amazonaws.com/fulosobezur/fisone.pdf
    • http://leragirifodoz.rf.gd/how_to_improve_christian_marriage.pdf
    • https://s3.amazonaws.com/lowuwofuxali/mexegiluvavibitadive.pdf
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_27ab087c3b6c4234ad599320e2e143b9.pdf?index=true
    • https://s3.amazonaws.com/jejulurowev/62493411204.pdf
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_57bdc24997d840638fa616eb0242fca9.pdf?index=true
    • http://tasefireribiziv.epizy.com/what_was_the_act_of_uniformity_1549.pdf
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_928f7fbe90ff447ba55e53ab58d5a8c6.pdf?index=true
    • https://s3.amazonaws.com/kesumasaka/betheme_header_builder_plugin_free.pdf
    • https://s3.amazonaws.com/nevovumowa/biometric_security_system_project.pdf
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_517f9080d79b426aa7203dade9c3c041.pdf?index=true
    • https://s3.amazonaws.com/xuxifuzituwu/tidadov.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_off00016410.bin
641c3796cf0f49b5d478f13ecaed99dcd1be3af11fa266afe3f131b825e5e7e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16410 5384 bytes
font_01_sfnt_off00017664.bin
0fafc09c16799f69f11eb93410bdff5a7bd3a18d143c318453bb27b1a96813ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17664 12596 bytes

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