Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a06328369889402…

MALICIOUS

PDF

76.6 KB Created: 2021-03-28 21:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a0e19e4886614ab229a426659bcea46 SHA-1: 4acc2e39d08d2ae74a042296948e807201194de9 SHA-256: 8a06328369889402079696c40dafd55a05bc762c8af00cc390cde0699703b23c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, appears to be related to game hacks, likely serving as a lure to direct users to malicious websites.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=dead+trigger+2+hack+apk+mod
    • http://werikipirojenob.scienceontheweb.net/zikatevi.pdf
    • https://tunivarururi.weebly.com/uploads/1/3/4/0/134041149/pelefedetibojuk.pdf
    • https://cdn-cms.f-static.net/uploads/4385014/normal_6017198e5eb80.pdf
    • https://vinosubolab.weebly.com/uploads/1/3/5/3/135316207/2e7480.pdf
    • http://gekorepakeje.iblogger.org/41971447448.pdf
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/7194330.pdf
    • http://sizuxofutitarax.mypressonline.com/baguvuvuzebifuzuf.pdf
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/zudunosogojigofo.pdf
    • https://vokedovewugom.weebly.com/uploads/1/3/5/3/135349322/7369a450268b.pdf
    • http://dokarukaxita.22web.org/nosuxo.pdf
    • https://funapimezu.weebly.com/uploads/1/3/1/0/131070883/vadotazatozewodug.pdf
    • https://xuvurabog.weebly.com/uploads/1/3/2/6/132696285/lejaj-dizud-bemapokipelize.pdf
    • https://zemijawa.weebly.com/uploads/1/3/1/0/131070152/63c42cd53.pdf
    • https://cdn-cms.f-static.net/uploads/4393514/normal_602ab6b9abd72.pdf
    • https://cdn-cms.f-static.net/uploads/4413111/normal_604cde34913e2.pdf
    • http://sozapemogoz.mygamesonline.org/uft_retro_payment.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://voxaxos.rf.gd/63908250417.pdf
    • http://limulusukad.rf.gd/awanish_singh_ringtone.pdf
    • http://bukujinelekoxi.epizy.com/90529694007.pdf
    • http://xezabesazigida.epizy.com/vejigantes_francisco_arrivi_libro.pdf
    • http://gikunipif.epizy.com/33516866002.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_off0000e2aa.bin
5d97ace93fea12f61f60dd76ac70b48cda59fd999456b9dbf652b06e0e6a2189		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 5472 bytes
font_01_sfnt_off0000f529.bin
911d963a8924ef9e4d59c4a46c2f4bce069bb7bfa9aad0e36c02fcb9bdb762fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF529 21296 bytes

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