Malicious PDF — malware analysis report

Static analysis result for SHA-256 233a702306228fa8…

MALICIOUS

PDF

69.2 KB Created: 2021-02-24 03:44:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7fa295dda914de4abb6d153d1bdd7694 SHA-1: e7df03f99c2dc8a201126b13b409c73fe88423b8 SHA-256: 233a702306228fa8bf867e816b3db5353cc47bce5b2a1b5a9d53d165f2f420ab
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains keywords related to games, implying a lure to attract users to these malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=bullet+force+multiplayer+pacogames PDF link annotation
    • https://bamewubi.weebly.com/uploads/1/3/2/3/132303354/nopevokaker.pdfIn PDF document text
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/dosofu.pdfIn PDF document text
    • https://filinisosiwox.weebly.com/uploads/1/3/0/8/130814007/2063de3b8b7a.pdfIn PDF document text
    • https://zitakutuseg.weebly.com/uploads/1/3/5/9/135994262/5527505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420765/normal_5fe0911d1f12c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5ff05c5a89e3f.pdfIn PDF document text
    • https://wegolabama.weebly.com/uploads/1/3/4/5/134511146/vomejuve-bumoz-zetir.pdfIn PDF document text
    • http://zasasibibo.iblogger.org/kidomokuwevigufumim.pdfIn PDF document text
    • https://kabirajozef.weebly.com/uploads/1/3/2/7/132740353/4816542.pdfIn PDF document text
    • https://petodudugagakot.weebly.com/uploads/1/3/4/6/134640630/jupurotibujowu-giweb-lubikipita-zovigokusavipaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450624/normal_5feb782de7d3c.pdfIn PDF document text
    • https://gariligiradafa.weebly.com/uploads/1/3/4/0/134041078/biziwokalimemix.pdfIn PDF document text
    • https://bozajeja.weebly.com/uploads/1/3/6/0/136082115/6e3474b2ee203.pdfIn PDF document text
    • https://sawuwirepugasup.weebly.com/uploads/1/3/0/9/130969548/1f3cc8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vebenok/angina_pectoris_guidelines_aha.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/cara_buat_cv_menarik_di_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/anime_espaol_latino_apk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B0 5488 bytes
SHA-256: 3c87936b807bb0d7de5ff3c98620593643e9c82e588a98f9b2de3cc557e443ae
font_01_sfnt_off0000e558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE558 10148 bytes
SHA-256: bd6544209e0d25775911651732baaed2bafa9a46adfeb85317f8f32043cff089

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