Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d6d963c7f5fd4e…

MALICIOUS

PDF

71.2 KB Created: 2021-02-06 05:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f4bd210abf31a2502a347c20360ac62f SHA-1: 7a330dad6f1ccc6de7a2131d42a44c66c57a60f5 SHA-256: 74d6d963c7f5fd4ead17003e957c892734fe19f601863c4d22330128e321899b
254 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
  • 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.
  • 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.
  • 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://yafferge.ru/wb?keyword=business%20card%20mockup%20photoshop%20free In PDF document text
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/9df1edbbe.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/iHwgcxt/sdg_goals_undp.pdfIn PDF document text
    • https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/fff047.pdfIn PDF document text
    • https://vujezogovi.weebly.com/uploads/1/3/5/3/135348950/503ac5e1278.pdfIn PDF document text
    • http://delojenopow.66ghz.com/definition_of_vermiform_appendix_in_anatomy.pdfIn PDF document text
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/gakoxegotogo.pdfIn PDF document text
    • https://tasidumil.weebly.com/uploads/1/3/2/6/132680907/funukel-zekiweretuzuwar-manoteweratu-worevovirimefu.pdfIn PDF document text
    • https://malomunadososep.weebly.com/uploads/1/3/5/3/135351096/2299662.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/ximupuv/pegawupadisizetiledug.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/maxen.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/ghoul_netflix_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/algebra_history.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/lojakawezipeselegu.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/causas_sociales_del_bullying.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/kopavug.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_off0000d98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98C 5476 bytes
SHA-256: c4990f2ecc35e78fc4ddb3ef85c01610ae5630ec9dab82b4e5399f3621c6eca4
font_01_sfnt_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 10508 bytes
SHA-256: dd455e41ebc0eb99f579a735e2f6f102a8332fca116d75dd64acb81bca5b7e8a

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