Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ba1a3085663928…

MALICIOUS

PDF

75.4 KB Created: 2021-03-02 18:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e6388d52d5e6da08d92a45253f0316b5 SHA-1: 10c725fc4a7c82e71a50b12659d69f8a02f7612d SHA-256: b3ba1a308566392896fb47bd9c43ba36c0be094d679e84f7ee8206709168bb57
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9999

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://pelibifir.ru/strik?utm_term=sex+and+the+city+season+1+episode+1+streaming+free PDF link annotation
    • http://enots.space/neon_city_riders_artemiolq8kk.pdfIn PDF document text
    • http://vinadulateg.22web.org/mimamulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489263/normal_6033ba6692f33.pdfIn PDF document text
    • https://lopolovugafi.weebly.com/uploads/1/3/4/1/134109017/jijotoxatabu.pdfIn PDF document text
    • http://strongcreditscore.info/lukumizakezopunixonuvyb1q4.pdfIn PDF document text
    • https://fojaloda.weebly.com/uploads/1/3/0/7/130776233/a7991.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/cCjhfjj/pec_conductor_size_calc_free_water_deficit.pdfIn PDF document text
    • http://awpmode.com/11265933229lzf10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365540/normal_5fccb05b08220.pdfIn PDF document text
    • http://autoupgrade.website/51737550592si8ta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_601f1026dce89.pdfIn PDF document text
    • https://guwuviwanawa.weebly.com/uploads/1/3/2/6/132695801/tagurar-newigamijut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://moniladipawi.epizy.com/ccitt_a_law_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/molecular_electronic-_structure_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/lokumomovulimoterokaf.pdfIn PDF document text
    • http://palisenedabelo.epizy.com/dagezufev.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_off0000e51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51B 5860 bytes
SHA-256: ff2dacdfde5e39137ab920d6553817dec3e50f3aec1bd3dfdb5f2e1804b58de7
font_01_sfnt_off0000f8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FC 11056 bytes
SHA-256: d31497fcdcc1f7f1109906d13ec3fcf71ffbc5d422168933c9bcc9e42ee3c5f4

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