Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0faec30cd9bfe9…

MALICIOUS

PDF

92.4 KB Created: 2021-02-05 19:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a01b124c556a788b95295789e4c0ed77 SHA-1: 4015535879281c38142c6862658ac0c8b671d6f6 SHA-256: 8b0faec30cd9bfe9e3f8fbd5877e01914c1ae3d22e7e4102e1aad6b97a5bb7a4
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/aws?utm_term=net+framework+offline+installer+4.+5 PDF link annotation
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/vunobatetet-tulujoj.pdfIn PDF document text
    • http://generatorsale.ru/jusakenigedusirifepifegy8918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_600ecb63c65b4.pdfIn PDF document text
    • https://mutomutozuso.weebly.com/uploads/1/3/0/8/130814133/3bd1e75743.pdfIn PDF document text
    • https://fomunova.weebly.com/uploads/1/3/4/6/134684458/8333122.pdfIn PDF document text
    • https://pisiteju.weebly.com/uploads/1/3/5/3/135314571/fovuduxot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426557/normal_5fcf6b4453d9a.pdfIn PDF document text
    • https://lulujazopo.weebly.com/uploads/1/3/4/7/134769354/074673bb360db7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ditatunejapazik.epizy.com/fasaliwotutirajofi.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/xuxewaketunaxabobize.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/4033571479.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/kilalowabugi.pdfIn PDF document text
    • http://selaxarizipa.rf.gd/37949614727.pdfIn PDF document text
    • http://lixaxezubor.rf.gd/bein_sport_hd_live_tv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/air_fryer_philips_walita_manual.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_off00012525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12525 5280 bytes
SHA-256: be951b354ded49c03440df526eb98eedd21f4d52474bfe8eee0fd46aa9b20614
font_01_sfnt_off0001372f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372F 14704 bytes
SHA-256: 6ada3b511b22eda2e46e4735854f14dcb2a5bcefb1a19f34134819e0cfc99a0a