Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8dd6f0534fa18a5…

MALICIOUS

PDF

97.2 KB Created: 2020-11-23 00:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e895ebfccb9ccce853b17425807b59bd SHA-1: 08e6a2df012d5238dfbc1e59020539c37e6bafbb SHA-256: c8dd6f0534fa18a5ae95259536b4898219ac03c6ef0c236d4cdcc95fea553f78
194 Risk Score

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.
  • 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.
  • 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=asean+variation+guideline+2013 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387811/normal_5f9e073b49d08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5f93e8764c7a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f8d3a15ce836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476123/normal_5faf1118d9269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488574/normal_5faefba853b0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417032/normal_5fa07d176ca9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_5fa8cc9395b61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bomifabipi/rofepawufofabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef369986-6881-458b-ac13-95b338077341/free_diaper_raffle_tickets_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debf2cd4-1bea-468c-b522-80b10465d14e/20239406225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3029a6e-ed05-4814-8a78-447d28bcbd35/parts_of_the_atom_worksheet_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13125 5416 bytes
SHA-256: 49c308c7b309c9d85996f03a31c38be52cf28645372edb51267d0a5fcb8620ae
font_01_sfnt_off000143a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A4 11232 bytes
SHA-256: 24f04bb8d63098a3fd5105c864bd1b45ee1028684b294bd32a29da14c82e7558
font_02_sfnt_off00016854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16854 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3