Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f61bff93832c76…

MALICIOUS

PDF

73.9 KB Created: 2021-01-01 18:18:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: df63216a58ce26d5def1a64e10c529e7 SHA-1: 0ff067af792480407a1ff950b3ef067f943e248e SHA-256: a8f61bff93832c764b5884edbe5bd521f8dd8f97d48ad647221d725212f39e2b
136 Risk Score

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffe.ru/wb?keyword=inspiring%20success%20stories%20of%20entrepreneurs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5fc2a01cc984c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411696/normal_5fdca4d97cf6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_5fc163d4a14ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f895babe56f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_5f9e010619047.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5fe700c79c7ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392451/normal_5f91070e8db79.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/8616155f-8f18-4818-b9bb-312cbbe01e0a/gta_5_snow_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9749671-97d2-4a81-91c1-5ffcb7573cf9/fazapagodexoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f61c91-612a-4ef9-adf0-eb384785dc7d/71250141914.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/misazokunuginuseta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3fc7dd-40c9-4cb5-8143-3ef3c10aa01f/77993515577.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/difawifavurepixenepisiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f2b785-317c-4450-b396-ff511b8fe552/89272290925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/701fd081-bb69-4874-9576-e7ba09f03033/89136259826.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_off0000e464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE464 4880 bytes
SHA-256: ea58c8ad54edeed935547b0446264ec3283db3037538b1d141ea4882d6a1ad74
font_01_sfnt_off0000f51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51A 11148 bytes
SHA-256: 9f1eec70a1130cdf7ad76b6200f1da066b782e354cc69da0813ae1bfb47c1a7c