Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6f4b58e826625c…

MALICIOUS

PDF

85.0 KB Created: 2021-03-09 16:35:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b2b9f23658101152951f13f205dbbbe SHA-1: 23969b56a21f2e02115f8d50758889591675b679 SHA-256: fd6f4b58e826625c703c0f2c59a6f5ba0f67d45f130ed36cf69ffc49309cbc29
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, suggesting it functions as a link farm or phishing lure. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly indicate an attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/award?keyword=awaken+the+giant+within+pdf
    • https://cdn.sqhk.co/xivovido/Ldghhdv/roxizoru.pdf
    • https://sanawovixib.weebly.com/uploads/1/3/4/6/134653903/f6edded6.pdf
    • https://cdn.sqhk.co/tamejenonisi/janhbja/anger_of_stick_1_hack.pdf
    • https://cdn.sqhk.co/sepokafaru/hfhajj9/desktop_tower_defense_pro_download.pdf
    • https://cdn.sqhk.co/xamitarerivu/ohfihOB/limisonatuvodoxudo.pdf
    • https://boxorefo.weebly.com/uploads/1/3/0/9/130969922/7746958.pdf
    • https://cdn.sqhk.co/kajipazuto/hjNMigH/1583966046.pdf
    • https://zelareto.weebly.com/uploads/1/3/4/0/134096818/6348630.pdf
    • https://cdn.sqhk.co/kogewole/heViiBz/download_zombie_catchers_mod_apk_2020.pdf
    • https://cdn.sqhk.co/dibitarebizu/fjejejd/32675869041.pdf
    • https://cdn.sqhk.co/fumamimed/ijjigje/telemedicine_jobs_for_physicians_in_illinois.pdf
    • https://cdn.sqhk.co/petawelesup/bhcmjdb/zunowudodadopif.pdf
    • https://jagotizepevex.weebly.com/uploads/1/3/4/4/134464701/2352268.pdf
    • https://cdn.sqhk.co/fovugemut/FuhdUo9/34992985809.pdf
    • https://furogareb.weebly.com/uploads/1/3/1/3/131397930/6120637.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pevarijidasalop/ntsb_preliminary_aviation_accident_reports.pdf
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_fc4daba66edd4e6c91535ba103057124.pdf?index=true
    • https://680b96f7-c70a-468b-a697-68638c24dfdb.filesusr.com/ugd/d55797_e55baf2fd38e4d0498fb6e67fa9ca929.pdf?index=true
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_e02b3fc4e2b948639e04e6c2f496d087.pdf?index=true
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_8487b4374c254db09a324785fe34420f.pdf?index=true
    • https://s3.amazonaws.com/juzewojavomofew/lg_dishwasher_repairs_near_me.pdf
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_fd8d6024dd8f49beac83f5bc8f539d9a.pdf?index=true
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_3922319e2bc8443ea032a57102f9d7dc.pdf?index=true
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_30004de50da1464e92f7d98075b95210.pdf?index=true
    • 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_off000110b7.bin
8becaf292907204ff626b277f4738cb13c01d51b877d266e07ec79cf9e90e976		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110B7 5144 bytes
font_01_sfnt_off00012257.bin
ad69c8550f774332a1294faefed7c8042f18680bffd183bbeda86a81873736cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12257 10476 bytes

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