Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0301892e584a59b…

MALICIOUS

PDF

69.9 KB Created: 2021-01-02 02:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5799bae470baa2130de00e6f8f1f478d SHA-1: c2b046449356d77ef2a0f7fdda31b3ed58e44692 SHA-256: d0301892e584a59b43c15ef5a5575a006e38c4892bd57ceca2a3b3cc5d408bb9
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'mcgraw hill networks government worksheet answers', likely to trick users into clicking the malicious link. No scripts were extracted, but the presence of malicious links and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=mcgraw+hill+networks+government+worksheet+answers In PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/foxulinabosuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/ketadasogob/g9gjUgd/sound_fx_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/9Sssrhb/15986522861.pdfIn PDF document text
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/lewiberawivar_jogajemiseput_lakavasu_fizegen.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/mefogiw.pdfIn PDF document text
    • https://cdn.sqhk.co/vemikozoj/EQjdjqS/slots_for_free_fun_no_download.pdfIn PDF document text
    • https://mawosamaretezij.weebly.com/uploads/1/3/4/8/134860838/5904048.pdfIn PDF document text
    • https://fevebelok.weebly.com/uploads/1/3/4/0/134012800/ed7a46827b6a.pdfIn PDF document text
    • https://lolijejolo.weebly.com/uploads/1/3/4/4/134442146/192827.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/jgicqjh/18111545780.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafaveju/jcjoUgi/segigogavelo.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/zopexakunifon.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/jhCgez2/vinidutuluzapukep.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/ladojenefe/vekovadodawaz.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_off0000cb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB03 5432 bytes
SHA-256: e1a3ff72bd9ee3a8eba2bdd3afa1e7c1ec71065112ae8066287b976ed355eef7
font_01_sfnt_off0000dd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7B 14388 bytes
SHA-256: 2bc04d7454c7b017395167bbb1fe994a67a46c8b86908cd53d070f9cde5d9477

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