Malicious PDF — malware analysis report

Static analysis result for SHA-256 313f7db9a5a864ae…

MALICIOUS

PDF

78.3 KB Created: 2021-05-19 07:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f63ec9de310e1e72708efd5fe6587c10 SHA-1: de4bf56346ed980ed4348e838518b78b415ef307 SHA-256: 313f7db9a5a864ae6057bfdafdf7137b6b00902770a46349464b5695ce18eba9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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://botokaw.ru/strik?utm_term=imparfait+and+passe+compose+test PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389824/normal_60580dc2ddbff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5fe6b5c8593b5.pdfIn PDF document text
    • https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/mevizatel_wuzaro_derivosena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_605baf5929f92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424981/normal_6028a9aba130b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_606e0044e590d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460946/normal_600b91049ee1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_604ee1c83912d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490244/normal_6008a788b2284.pdfIn PDF document text
    • https://bopunesarikimar.weebly.com/uploads/1/3/1/4/131453984/6775923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_60310742dc96a.pdfIn PDF document text
    • https://wijuluberaselak.weebly.com/uploads/1/3/4/0/134016921/wobadawowuwiwozutanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413968/normal_6043a21b31612.pdfIn PDF document text
    • https://ravijirigiraga.weebly.com/uploads/1/3/4/6/134649302/zusifiwepumutasimito.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/libeganot/alluvial_soil_characteristics.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/zerumulumuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/25496856643.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/commando_3_game_free_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/tegepolejafal.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/58908834541.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/international_mail_cost_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/68607560657.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 5208 bytes
SHA-256: d7a5897430e033f7bab290c6736b0dab9e8ffb7b3fc9f21c03b4e44e5c5a8e07
font_01_sfnt_off0001033b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033B 11864 bytes
SHA-256: e6ba951dc55020be75387da6c27697cd0f59a17216d53274764cb77a331658b5

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