Malicious PDF — malware analysis report

Static analysis result for SHA-256 345da5ceae65d02d…

MALICIOUS

PDF

83.9 KB Created: 2021-05-11 21:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9bae96d6ed606ba910a36732113d5f91 SHA-1: d8941c9f4242a6a7f4a02d5cbf07d39c48833dae SHA-256: 345da5ceae65d02d36c6d3666b3d936c0763eec95a77bae5b70d4a1f68ad837f
156 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=certified+fraud+examiners+salary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448984/normal_5fd9906cc968e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378619/normal_5fcbe2da5b013.pdfIn PDF document text
    • https://detazemunowovi.weebly.com/uploads/1/3/4/7/134704720/bapobufuf-lodoririropi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469623/normal_5ff0708a80c0f.pdfIn PDF document text
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/sopijan-lasimazinuno-mumebim-mukiruxobojajej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_6011ef812c6d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_605d7d4bbd2ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_6051abf52d20b.pdfIn PDF document text
    • https://gugukufetufa.weebly.com/uploads/1/3/4/3/134337187/5770672.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/pisik/my_talking_tom_gold_run_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/hoover_spinscrub_60_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc617fa-f48f-41c2-9896-2464283dbde7/robertshaw_7200ercs_7c7-g8f-545.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/27096570974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/837e2f27-f6c3-4ebf-b3b3-15faca93c1a8/diboxas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8e0508f-ae71-49ba-acf6-d4fa598fe5d4/49617270515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af67e81b-19f0-4fe6-8721-e881fe67e05d/65528752584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38313dd0-8ce2-4a94-9c1e-d2333fe123f5/41837522764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2dae540-d87f-4d7f-834b-d458ee89ec9f/how_to_use_ps3_controller_on_pc_without_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec615ed0-3ee4-439e-b0ff-ce70b379f55e/medijexadib.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/xalobareko.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_off00010b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B90 5128 bytes
SHA-256: 2d527eacf1c8907555571818ae26898a992beae8f176486432a088398ab8dc30
font_01_sfnt_off00011cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF4 11024 bytes
SHA-256: 7dda044ddd8b0e2d6080045a40f6359d56e6a022a16a16c38253c4e31b94bd85

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