Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4af0452e5a268be…

MALICIOUS

PDF

73.5 KB Created: 2020-12-20 19:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 44702c53c774f8dbd1a1e2f1658398cc SHA-1: b594f49e89078c95622beecb94adaaafa1e945b0 SHA-256: f4af0452e5a268be66777115c8875ece0de701a0df69ae0cac3ef1c3b927a765
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The embedded URLs likely lead to further malicious content or phishing sites.

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://trafficel.ru/strik?utm_term=tiger+anatomy+toy PDF link annotation
    • https://pajoxobonojizo.weebly.com/uploads/1/3/4/7/134702513/1689021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_5f91bc9194c47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448535/normal_5fd959c1d0a5e.pdfIn PDF document text
    • https://ragulifogikub.weebly.com/uploads/1/3/3/9/133986704/3694644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467005/normal_5fa9c357b1a6d.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/a87c9084e93e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_5fc0687cdfc53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5fb83bb56968b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417213/normal_5fd1df53e1ca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_5fa903953ade1.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/debiwelof/behringer_europower_pmp5000_powered_mixer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/protected_areas_in_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/riruzusojinebunur.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/78246275871.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/forex_hedging_strategy.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_off0000e5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 4844 bytes
SHA-256: b5e1a1dfc928869c36aa24a3e36f850ecbce3d446ce8d7ebcc61f4d1eb89f125
font_01_sfnt_off0000f670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF670 10144 bytes
SHA-256: a9f20c96a56d4ffe8003e2840101d517e0e130d57490161d3c790e7fe7c34f99

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