Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b15e6adaa7c749…

MALICIOUS

PDF

75.6 KB Created: 2021-02-19 09:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bfeefb9e2b8c33176127067191c709be SHA-1: a80b0b466f26273472a4bfd95d46c14735558c9b SHA-256: 02b15e6adaa7c7492a33ca95333e783f8058dfc4333cf060ae0c8d8236347a54
166 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically mentioning 'recover yahoo account' and pointing to a suspicious domain. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be a pretext for delivering a password-protected archive, a common tactic to bypass security filters. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://baarspo.ru/wix?keyword=recover+yahoo+account+without+alternate+email PDF link annotation
    • https://jepuderakemuso.weebly.com/uploads/1/3/4/6/134666912/sisenovasevaroxaj.pdfIn PDF document text
    • https://rinuvigilositu.weebly.com/uploads/1/3/4/4/134463450/lokaj.pdfIn PDF document text
    • https://cdn.sqhk.co/rakapuvad/1whbTzo/31366153606.pdfIn PDF document text
    • http://nominasacra.ru/nfl_live_streaming_apk_for_firestickv4qi3.pdfIn PDF document text
    • https://lelamibi.weebly.com/uploads/1/3/0/7/130738841/8792981.pdfIn PDF document text
    • http://usejus.club/82146874356mj970.pdfIn PDF document text
    • https://gilaxaled.weebly.com/uploads/1/3/1/4/131438091/5210fa.pdfIn PDF document text
    • http://interstart.online/mekasunudaxsivbj.pdfIn PDF document text
    • http://hellesypakk.online/fufupadubeduvutuzuwipqf7j.pdfIn PDF document text
    • https://cdn.sqhk.co/gikasiful/Ijbuss2/55308592832.pdfIn PDF document text
    • http://ayazshabutdinov.club/88465891792ni3qt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zidukimozefuz.rf.gd/bavogive.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_off0000ed47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED47 5120 bytes
SHA-256: 028faf3d1944b5ad35cc9557cc59af4281f415be7c675dbd2a31370fd513fbf6
font_01_sfnt_off0000fead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAD 10160 bytes
SHA-256: caaef7362423724d1823aa1dd6d689cdff5f51e70ca89273618b0e5e200e91cb

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