Malicious PDF — malware analysis report

Static analysis result for SHA-256 45283b8e5ef89b31…

MALICIOUS

PDF

71.3 KB Created: 2020-12-02 00:12:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5497487bb77032bedadc585df1a566c3 SHA-1: fce5b4f968a3ba7857031cfe8b0cf7bf16a1d6d2 SHA-256: 45283b8e5ef89b31fc03bc2edf16457ec6c7aba15517aa2c6558dff14085728c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafficel.ru/123?utm_term=pathfinder+2e+gamemastery+guide+pdf PDF link annotation
    • https://nigikejogu.weebly.com/uploads/1/3/4/9/134902550/pekogorebinomeb.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/1289421.pdfIn PDF document text
    • https://dugizixenopiloj.weebly.com/uploads/1/3/4/4/134457585/jokulipozetol_puwexudet_vomepedofe.pdfIn PDF document text
    • https://zadujemerumid.weebly.com/uploads/1/3/2/6/132695269/9626804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5f94e2342bb0d.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/damerirazib/80480704869.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/vixopisumel.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6e9ea4a794d56455deb/t/5fc5157c3f75b16643753edf/1606751613653/the_world_nightmare.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc144dc68612547ed60a5eb/t/5fc2f78b145a8629dc12e140/1606612875829/gendex_gx_770_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e7137c-0cb4-469f-80e1-cc248b4db110/likigunuwo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5a373570fb44d1f9ed8d/1606375991562/farberware_air_fryer_oven_recipe_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d948181-a2e2-4a6f-b7ce-2ab8084a6304/hollow_knight_ame_royale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d92f11f6a4198485658d/t/5fc308d12dd96f5918526b26/1606617298213/echoes_of_aranea_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD087 5656 bytes
SHA-256: fa4a8cda4911b9778ba01918979d2b693e44789903e52a3e566067facd1630b2
font_01_sfnt_off0000e3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A1 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000ec2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2F 10376 bytes
SHA-256: 82c927cf1de0b31cdd315d277a6aef380b63b733eefaed46bb4e921321e96165

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