Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6debd5d84f8c03c…

MALICIOUS

PDF

99.1 KB Created: 2021-04-05 23:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d3e627bdcbc4068493618e6b070e09a8 SHA-1: 17a85518a1e5a8e3b92262bc4dbd40fe3a4632df SHA-256: b6debd5d84f8c03ce7b930f382efeaa0239e0530e24dacc04511fb2a23c48559
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 0.9996

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://jacksth.ru/wix?keyword=dyson+hot+and+cool+am04+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369779/normal_5fff46095762e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478961/normal_5fe37d094aeb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414672/normal_605f52f41ca20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465025/normal_602071ea50c93.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/jpijK29/cat_condo_cage.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/6MtQbZ8/45904610215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389107/normal_60027ceb1cdf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465704/normal_5fcebd2032427.pdfIn PDF document text
    • https://jaketomerinojox.weebly.com/uploads/1/3/4/1/134109184/5537734.pdfIn PDF document text
    • https://dazenesulamese.weebly.com/uploads/1/3/1/1/131164173/koxofo.pdfIn PDF document text
    • https://cdn.sqhk.co/gozolijitow/ijcqnji/atarax_side_effects_weight_loss.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_600c45e1ac268.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/davolazupivowi/how_to_lift_weights_at_home_without_equipment.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/beneficiary_ira_tax_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/78153917686.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/eragon_pc_game.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/salomifipikexiruvafig.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9C 7576 bytes
SHA-256: 5373ef558e68f98ae25315ae314c2b58d0e8cbb7d3ea74bbbaa0bcc2a5d8bcb5
font_01_sfnt_off00012467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12467 5416 bytes
SHA-256: 1d54135d133a8ee77a393bd98d3f54b13c6d658e7923f71a46daa12dc7877e64
font_02_sfnt_off000136c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C0 16040 bytes
SHA-256: f92752e8eee3917fcaa39f400ac1ef519aca46217a8514875a7cc0beaa6e8a03
font_03_sfnt_off00016964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16964 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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