Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7c2a194dd90fcb…

MALICIOUS

PDF

81.1 KB Created: 2021-05-07 01:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 68f69b6361a74ee9a4139dc29741bfce SHA-1: 6b2ffd0ac63068cfd760df12469cfdb2f128f3c4 SHA-256: bd7c2a194dd90fcb6e23aaae6e58d06f4a8d0dd04c7efe3b294a289eee400063
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a mass external PDF link farm, with one primary external URI pointing to 'https://resalured.ru/strik?utm_term=what+major+events+happened+in+the+year+1910'. The document body is heavily obfuscated, but the presence of numerous external links suggests an attempt to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://resalured.ru/strik?utm_term=what+major+events+happened+in+the+year+1910 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446914/normal_5fc6bcbac3156.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420743/normal_600b31924bd14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_60674eb42b72f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375515/normal_5fd053bba50fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_6064150e9fa8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418192/normal_6000c19f8567a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_6001ecfd1a334.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455174/normal_60004dfebbf63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409811/normal_60469866876c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477615/normal_600b6de062e71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c0c8a0a-26ec-4b86-b17c-b6bebb16dca4/make_money_from_home_ideas_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/how_many_quarts_does_a_chevy_350_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfe8866-e907-46b6-b5db-00a90f205386/beats_solo_pro_wireless_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe7bd10a-8d8f-40ee-a3d2-b581cc7c8ab0/why_is_my_hp_deskjet_2622_not_printing.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/swann_smart_hd_wireless_security_camera_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b809737c-e052-4b8e-a76e-30a60cf9d806/lenipaferididubo.pdfIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_c4504e4587414387a38c54b0e4f37919.pdf?index=trueIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_5d9cacb21c534b488f36d347c551df59.pdf?index=trueIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_892850f32e64461d8b15cf3123bdb5ae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcfcfb7d-cd41-427c-91ad-d9960131da58/best_rhyming_words_in_hindi_for_rap.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/58317660482.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_off0000fcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 5768 bytes
SHA-256: 90c5af38e29c1f8025e17711a67cc2a666e9f71f508176de4028bcc305d0ce6c
font_01_sfnt_off00011045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11045 11400 bytes
SHA-256: 5248bfe3806238b9f65c657530565ed7e8c75cfee07dc5ddd099a29d469b0a23

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