Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ad7c5a5c13f7ec…

MALICIOUS

PDF

68.9 KB Created: 2021-02-20 14:16:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9958120b24e1406f17dd6c7ebb462323 SHA-1: e36ced60f1ef0b775ba5f3788334edd7642b108c SHA-256: 05ad7c5a5c13f7ec6a183335d5127848cbb7df1b0431db08d6bcb908f68ed944
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/aws?utm_term=possessive+adjectives+worksheets+for+grade+3 PDF link annotation
    • https://cdn.sqhk.co/felebamifuk/dVLjhji/chennai_super_kings_how_many_match_win.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/cAjuT2Y/45719506059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_601eea053ad7c.pdfIn PDF document text
    • https://cdn.sqhk.co/wadalibituge/iiijcjg/25376852191.pdfIn PDF document text
    • https://cdn.sqhk.co/xogixute/7FbDide/60264558535.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/eLcODhe/free_glitch_video_effect_app.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/jbhfVIw/hero_pups_patrol_coloring_game.pdfIn PDF document text
    • https://vagoledos.weebly.com/uploads/1/3/5/3/135320004/8df0108ba4cf.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/gipggb2/who_dies_in_harry_potter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459629/normal_5ff1c4318d445.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/jadhcja/99005250819.pdfIn PDF document text
    • https://cdn.sqhk.co/voromerubagu/z8gdjbU/37173287961.pdfIn PDF document text
    • https://sikefenuvip.weebly.com/uploads/1/3/4/0/134012601/3b55edc2f12.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxarabo/fhhgdJa/archer._io_tale_of_bow_arrow_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_602486ecd48a2.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/Gjapjg2/magic_fluids_1._8._1_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371025/normal_5fcdd1e2e0016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448718/normal_6016f5ab83b07.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_off0000ce98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE98 5708 bytes
SHA-256: 9317d3dedd321ace5e407d583003cc137ca647eacfa0b6b15e4f833d0a489c63
font_01_sfnt_off0000e227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE227 10560 bytes
SHA-256: 6c7e845a3f83b8dcf3b1f3375342603531430d9fae5c38db85f805771516d766