Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a28dd191ea9f4e0…

MALICIOUS

PDF

69.5 KB Created: 2020-11-30 14:13:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 43fa742b8df12fb247af6167df4c1d96 SHA-1: d6bfa7ddc8b7881857446187e7a7db15921598bc SHA-256: 3a28dd191ea9f4e0bd1d15d430fb9759a6f3821168f80bde0616a8c116c9222f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous external links, including a link farm, and one URL points to a domain associated with phishing attempts. The document body, though heavily obfuscated, appears to contain job-related keywords, suggesting a phishing lure.

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://trafffi.ru/strik?utm_term=diedre+moire+corporation+inc+jobs PDF link annotation
    • https://xavedogaw.weebly.com/uploads/1/3/4/6/134659805/dafonitekivokiremi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5f95f76fde9db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5fc0d6acb6112.pdfIn PDF document text
    • https://nigokozop.weebly.com/uploads/1/3/4/4/134436215/sipural-xaxuribusaledax-bamixe.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/legenapi/adharmam_tamil_movie_audio_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/autodesk_revit_2018_viewer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/858323b3-49c4-4842-bf8f-99424735ae50/52563927832.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf603d3c6ccf69f3561401/1606377534264/nba_live_97_michael_jordan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0e9fb474932ca26a1687/1606225567581/usps_expects_item_for_mailing_ssk_meaning.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2740a2757459be2c9b8/t/5fc423eef8cdb769c665fc02/1606689776496/kizaxalofutekajapajadobel.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe09035147b14804f9db59/1606289667650/33895476407.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc422feeaf37e3b641edb58/1606689535199/75662923929.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffea5239b0722912c2f3a/t/5fc210abe18c5c478e43271b/1606553774505/92902558647.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf579ec0a1d2b4e55057b/1606219129322/88736950959.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_off0000d42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42C 5400 bytes
SHA-256: 3bd9e5d10d912c9542163fbbff7fdfc58d464d57132c906323faf59f4dcaf193
font_01_sfnt_off0000e66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66E 10112 bytes
SHA-256: ea489a84d566e9c7d3ec8aa547dd9ae44aa16db167f7f87dc9f9f05c5ef2495d

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