Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d86dd19b226f95…

MALICIOUS

PDF

79.9 KB Created: 2021-02-21 06:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 497a185fd8b5299e75034df62e6b0aa2 SHA-1: dc0ec59ebf7fd8625d160872c90736f538c8c799 SHA-256: 92d86dd19b226f95e5ebbde2ec6c29c82c4866de1e6a73629fad31b4a714c53b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO spamming operation. The primary URL, 'https://bologen.ru/wix?keyword=atv+destroyer+unblocked+games+77', is presented in the document body, indicating a lure to a potentially malicious website. ClamAV and ML heuristics confirm the malicious nature of the file, classifying it 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://bologen.ru/wix?keyword=atv+destroyer+unblocked+games+77
    • https://geridaradekod.weebly.com/uploads/1/3/1/4/131437552/2591861.pdf
    • https://falosaxosudo.weebly.com/uploads/1/3/4/0/134017699/1fe95658a.pdf
    • http://wowezixuxaxu.22web.org/brugge_belgium_tourism_information.pdf
    • https://bitoranajezope.weebly.com/uploads/1/3/1/4/131453137/1918138.pdf
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/ziguxizarak_lusuzok.pdf
    • https://vunafenivanisip.weebly.com/uploads/1/3/5/3/135303543/4387798.pdf
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/ffec494.pdf
    • https://vomimefime.weebly.com/uploads/1/3/5/3/135316042/541d993801.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sabobenuwe/dimimatededefezozenexiz.pdf
    • http://vamudijikepefos.rf.gd/satitusofegufakimulun.pdf
    • https://s3.amazonaws.com/potofaw/best_website_for_cracked_android_games.pdf
    • https://s3.amazonaws.com/resixexi/algebra_2_slader_answers.pdf
    • https://s3.amazonaws.com/vukusa/18998718934.pdf
    • https://s3.amazonaws.com/mogipegi/datupafapejigu.pdf
    • https://s3.amazonaws.com/gixirojozogufux/rixifirikoluki.pdf
    • https://s3.amazonaws.com/bitizopovopaso/guitar_christmas_sheet_music.pdf
    • https://s3.amazonaws.com/xokebore/76066614741.pdf
    • http://tutapivemaki.rf.gd/farijumijosuvufujaguf.pdf
    • https://s3.amazonaws.com/fejakixoweka/wojenojafuxugukavapif.pdf
    • https://s3.amazonaws.com/zaxawetawupo/baldor_bench_grinder_operator_s_manual.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_off0000fa71.bin
c5d2aa23c43bc1e95e1a2caed73c25fa1f448ea8ca315e719eb9f2b8597eba64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA71 5692 bytes
font_01_sfnt_off00010dd2.bin
65470eb873ec8f9769c5c9d3137e226ad89238c6f2d50b577ca7384750cea35e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD2 10616 bytes

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