Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22e5974f6c101d3…

MALICIOUS

PDF

75.9 KB Created: 2021-06-09 11:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 40ecb15353c794f82c0266210ca48878 SHA-1: cfaf67754942d29caf5d419c2b1ea60171c3b649 SHA-256: b22e5974f6c101d384a6ffcc9574bab3b25bfe81ea69a08174f0314d6cedd833
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, with a primary external URI pointing to 'https://oniceh.ru/pbw?utm_term=laputa+partition+piano', suggesting a phishing lure. The PDF structure and embedded content indicate it's part of a link farm designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://oniceh.ru/pbw?utm_term=laputa+partition+piano PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367674/normal_5ff7ccd35f02e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417033/normal_602e75c4b3d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_601ec0be8a883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500186/normal_605687d43cf5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415544/normal_600575fd93f3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455387/normal_60281bcf7edc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416304/normal_6065f0670f7c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5fce89c43834a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5fdc6c0180fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464067/normal_605ee2f46ae55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wudiwiligis.pbworks.com/f/mudetonijolupowu.pdfIn PDF document text
    • http://xibosini.pbworks.com/w/file/fetch/144801153/bufirisofaganede.pdfIn PDF document text
    • http://gitizuxob.pbworks.com/w/file/fetch/144578832/acrylic_acid_production_process_from_propylene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3baf437-e966-4391-bbf3-8e21a6aa20e4/93959466205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0260b2d4-d317-4dab-a553-8909e8e3c5a0/93262278909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60244625-890a-4da6-b14f-197413bc894f/makixedekarexenexo.pdfIn PDF document text
    • http://wuxewuda.pbworks.com/f/vefefafolizizubojo.pdfIn PDF document text
    • http://dupalalo.pbworks.com/f/big_sean_i_decided_download_zip.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/jigeko.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_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 4544 bytes
SHA-256: ec2119370bb7719f22fba6b5eb6cf8dcf9eb974708155a6a73b0a124aaa4ba69
font_01_sfnt_off0000fadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADB 11692 bytes
SHA-256: 6de3fe995f729f715462e96ed4a485853b34e569b82d99a67a72210ed159c90d

Open this report in the interactive analyzer, or submit your own file for analysis.