Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a24f4769c2d41f…

MALICIOUS

PDF

68.2 KB Created: 2020-11-25 09:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ed6820dbd363a0daa29422946c68592c SHA-1: 9f2cdd29e2577cd732cd925e79beb9b6a81d0570 SHA-256: c8a24f4769c2d41f94a752c6e079e2df83794e76e64fc53ef1b9c9c474679ad0
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with critical heuristics indicating it's a redirector and a link farm. The primary malicious URL identified is 'https://ggtraff.ru/aws?utm_term=blackmail+odia+movie+song+full'. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect users to potentially malicious content or phishing sites, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://ggtraff.ru/aws?utm_term=blackmail+odia+movie+song+full In PDF document text
    • https://zukusabaxiwig.weebly.com/uploads/1/3/4/0/134000387/1581105.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/dawezuvupulun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9154c113-e14a-41dc-a571-829d31be72d1/genuine_replacement_parts_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b138a11e-0dd6-44d1-a36d-3e4b287f9578/pensamiento_filosofico_de_hegel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0944fdd5-14e2-4e0d-a887-308b79cd9b7c/jaxigedagujidel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62792b7c-cfed-4e03-93c1-a7f8233727f1/29905756090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ff22bb-a643-47e1-9410-a0d93d18be0a/molbe_za_posao_primeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a5037d-9fd8-4276-b49c-e25b8bb15878/hobart_slicer_hs9n_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/treatment_guidelines_for_neurosyphilis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e175c60-01ab-4380-88aa-673df190a224/34874649213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd409a70-b6b5-4664-bb84-af3cf5377c7e/rising_sun_budget_services.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/093e924b-8c92-4dd7-b955-4d17c62d9107/lalutasebutovewowava.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/uc_browser_software_karo.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_off0000cb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB78 5420 bytes
SHA-256: 1310d7e3f7680f0b168750f4d9a555276e94b4d1cdf2d1f4d0daae981408009e
font_01_sfnt_off0000dde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE7 11228 bytes
SHA-256: d1a96d2b0c495cba4aa452c76c6d210dcacd68e36fb6d5067d6c38485029be93

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