Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7dbc6db168222d…

MALICIOUS

PDF

66.1 KB Created: 2020-11-21 16:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: faffe146ebaeb27ed4ddb899a392cbdd SHA-1: 6e3406c7fe233767be809827042d9266cdb136c3 SHA-256: df7dbc6db168222dadcdd925324e390d14315d113287fcb44cbdc7a98a8dd10b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffset.ru/123?utm_term=daniel+plan+journal+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f9b43b06ce5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5fad567eb3139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_5fa8e76d479b8.pdfIn PDF document text
    • https://zojokoladateru.weebly.com/uploads/1/3/4/4/134497877/magasiwanelerezejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f88edb2c9af3.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1995322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5f98cf2d4eeae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5fb51b1b7048b.pdfIn PDF document text
    • https://luwutike.weebly.com/uploads/1/3/4/5/134518400/7582987.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pisedij/4635156443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aa2bb7f-b167-468c-975a-9ba3c5f3ac28/26697064169.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_off0000c59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC59C 4932 bytes
SHA-256: 6f31d740868622278b597c7babd1bc3f943cae4c1a844f3acf0a8f7f1feb127b
font_01_sfnt_off0000d680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD680 11008 bytes
SHA-256: 6e6137549175b13d48536c1d4cdfa614edb6a99dc3d4f7984a0631e50b15716e