Malicious PDF — malware analysis report

Static analysis result for SHA-256 961014428c2d3d9f…

MALICIOUS

PDF

67.2 KB Created: 2021-02-24 02:38:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 255ed8a3f4006bd204e34fa3791cf29f SHA-1: bc98e1c71e7a7369e40f6059366eb696792fd73a SHA-256: 961014428c2d3d9fc26f5ff8d64995222f334d0ea2fb56513a8191da23f0b051
166 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 high-severity rule for suspicious link lures and ML classification. The document contains numerous embedded URLs pointing to potentially malicious domains, suggesting an attempt to redirect users to phishing sites or download further malware. The presence of multiple disposable domains and link farms indicates a coordinated effort for malicious distribution.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jottigo.ru/wix?keyword=cricut+personal+electronic+cutter+power+cord PDF link annotation
    • http://uabiomanix.xyz/romenofamokadiboyre9j.pdfIn PDF document text
    • https://cdn.sqhk.co/tokejosanawo/bge8vLw/28960764022.pdfIn PDF document text
    • http://filanion.online/zomajejekibimimotuluxeba1v95k.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/pjeo3aM/47342088867.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/agejdhf/nidapugerepugaxil.pdfIn PDF document text
    • http://lnstagram-support.live/executive_assistant_letter_of_recommendation_templateuvkmi.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/mzjjxjK/lebiroduwememafidik.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/Hhd77ji/27468181050.pdfIn PDF document text
    • http://50offshop.info/movie_box_jailbreak_ios_1150847.pdfIn PDF document text
    • http://winclean-sale.shop/rirujunuh4034.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/mhc0idY/pureputupokenij.pdfIn PDF document text
    • http://navaram.online/halloween_2020_events_mnep1yw.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/UibSnje/77642077052.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/hiijZjh/notes_online_cute.pdfIn PDF document text
    • http://anyita.space/45716938172c1gzb.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/AijEjcM/kifutumexowidelavexu.pdfIn PDF document text
    • http://trylait.club/metformin_er_500_mg_diarrhea0e17c.pdfIn PDF document text
    • http://fuckfrsky.com/sensory_words_worksheet_kindergarten9dsf6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95A 5064 bytes
SHA-256: 0675ba0bbb44e0498c286d5ff2d896591ef375898f58e21cd282beaef1982501
font_01_sfnt_off0000dab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB0 10384 bytes
SHA-256: 0baecc3c9e77d7de4f85937ea32a4b7bc8bc8c8e6ee77ced9a2718102dc0b16f

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