Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ac1bac53bc91f1…

MALICIOUS

PDF

94.8 KB Created: 2021-02-24 12:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e57e1d700867d637c436927f8559b27f SHA-1: b1adfb62370deeb71c1ab6baf43877320d1b7b6d SHA-256: 42ac1bac53bc91f10b0a80869e26d58efa72b96981b6f6d00fed7fd2423b582e
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics identify it as a link farm hosted on disposable domains, with numerous external URIs pointing to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to phishing or malware-hosting sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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/aws?utm_term=memories+bring+back+you+meaning+in+telugu PDF link annotation
    • https://cdn.sqhk.co/tovipovo/SCjhqih/lowe_s_phone_number_to_pay_bill.pdfIn PDF document text
    • https://gawowulovo.weebly.com/uploads/1/3/5/9/135966180/danavuzavuxasuliwil.pdfIn PDF document text
    • http://copyright-notice-ig.com/call_of_duty_ww2_online_split_screenajb0z.pdfIn PDF document text
    • http://drilltech.info/gakenuvoniwus140o6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422620/normal_5ff0f295672e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426279/normal_5fcf4361723c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408993/normal_5feb720ac4139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_5fd7ea5a3cc49.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/02himif/f1_drivers_kneeling_silverstone.pdfIn PDF document text
    • http://reduslim-shopofficial.site/clicker_heros_code96wet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419001/normal_6020034b34e3f.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/cicjblN/dulodaweguxet.pdfIn PDF document text
    • https://xiligori.weebly.com/uploads/1/3/1/4/131411896/devanimobew-fafoviduwaxukem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pegozegi/greece_budget_travel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/61868044640.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 5312 bytes
SHA-256: 07a45739386f4d31e3e10cf26d5497aa992889115475e5c0e050ffb12e00bce2
font_01_sfnt_off0000fd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD14 27468 bytes
SHA-256: 37375d9700c427b6677b0d16ba80bdf1e14b722877445ed312c53aada670739a
font_02_sfnt_off000138c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C1 10464 bytes
SHA-256: 8144a467d95b48bd34fdfd2765449f20f6e609442a29e26d24a88cf921b04bf2
font_03_sfnt_off00015c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C97 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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