Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf902dfab33a943…

MALICIOUS

PDF

64.5 KB Created: 2021-02-27 10:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 43f0e389d220337c345928ea42405aaa SHA-1: 5959a33f7ad3bea579c4bca4afe1bcd6fa06ee51 SHA-256: 0cf902dfab33a94331354a7b2f84e4e0ec2422b1130ffde0045a26088a82071f
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://druttle.ru/award?keyword=kitchenaid+gas+cooktop+replacement+grates PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365659/normal_600803e4304b2.pdfIn PDF document text
    • https://xovotirepotu.weebly.com/uploads/1/3/1/4/131412955/sowanupekob.pdfIn PDF document text
    • https://pixipesigogod.weebly.com/uploads/1/3/4/3/134370637/tekipeboz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483097/normal_5fec340fc5810.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/tatimitubujatopogaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462708/normal_60322aff2cda1.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/coleman_spa_parts_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500911/normal_6030cd33c1412.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502248/normal_5fee26de34c25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_60203488ad8b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414679/normal_6021845d02562.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/tesotiwapax/50928459621.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/answer_tradutor_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/96438756752.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/xiaomi_mi_a2_android_one_4_64gb.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/analise_combinatoria_exercicios.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_off0000c163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC163 5520 bytes
SHA-256: 44ab2614e34c16fea10c4027d59144668cf17f3c8166a19ce2fec9ea90bc10cc
font_01_sfnt_off0000d400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD400 9652 bytes
SHA-256: 2ce8ae1b7cea58f82f5e710813cef5d6f8dba19249adad173ba1a02dd58a12b7