Malicious PDF — malware analysis report

Static analysis result for SHA-256 b38015538c85a927…

MALICIOUS

PDF

70.5 KB Created: 2021-01-26 17:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 924b360eb279513df5a54534e6d615f2 SHA-1: 7cc2ada1216f63ff9e3352c9f49bc332880ff440 SHA-256: b38015538c85a927733a237a2d71886dd3ddef80e703d6e855f74942de5d255c
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://druttle.ru/aws?utm_term=army+photos+hd+wallpaper PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387430/normal_5fd87729d6f6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370530/normal_5fe1a6ffc7bf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5ffc399925cef.pdfIn PDF document text
    • https://wofovado.weebly.com/uploads/1/3/1/8/131871653/5176597.pdfIn PDF document text
    • http://mysteps.online/67060055605ijt4y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474475/normal_5fc87a936c004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480898/normal_5fe8eb79d1046.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/8505683.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467030/normal_5ffa43cfa1a0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fde12ec20188.pdfIn PDF document text
    • https://nofogiso.weebly.com/uploads/1/3/1/3/131398128/2219844.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/064ccf27.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/hrojhlN/sodupumaduj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413865/normal_5ff6b0069a1a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497685/normal_5fe1d4d54f4eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD719 5384 bytes
SHA-256: 17d3a1b0467658e14cdff015585f45656a131788817c5b79d1c2bc811414164d
font_01_sfnt_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 10580 bytes
SHA-256: 5bb90e6cde8062c95ca5a020c0238b447d5213cbab954aadc0abbf634b4cdcc8