Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11d4ed20e7d95cf…

MALICIOUS

PDF

79.0 KB Created: 2021-03-02 20:54:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 35e63e09c68d4e2535439dcd31539869 SHA-1: e43a067dd834ac7125572ed7e5be998b77bfcf69 SHA-256: d11d4ed20e7d95cfccbf13d354e2d24fce14cf084dd318013ab5c4aea47e37b8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs are the primary indicators of compromise, likely leading to malicious content or further infection vectors.

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://leonvi.ru/strik?utm_term=homelite+dual+flow+pressure+washer+replacement+hose PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474988/normal_601091a498c54.pdfIn PDF document text
    • http://klosheff.xyz/635140177794e18d.pdfIn PDF document text
    • https://cdn.sqhk.co/fidumugovoz/kJNjjhi/carrera_rc_mario_kart_8_yoshi.pdfIn PDF document text
    • https://cdn.sqhk.co/bejadelu/c6jbSje/mini_stroke_signs_symptoms.pdfIn PDF document text
    • http://world-wildshop.com/72247063661b40nj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381321/normal_5fd05ba911f62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_601b51d38dd1c.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/jbEjbou/mefuxave.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/Rv1GhfZ/puberenakofuwusubob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_601f291d8d18c.pdfIn PDF document text
    • https://funogefoxareso.weebly.com/uploads/1/3/4/0/134041001/febepelobivomu.pdfIn PDF document text
    • http://odemebayisitrafik.com/egg_wars_2_download09v23.pdfIn PDF document text
    • https://gugekeki.weebly.com/uploads/1/3/4/3/134374678/b2da91a14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_602de3a90de71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375507/normal_5ff8fa8b2f2dc.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/falevi/top_games_for_pc_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/79325022616.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/81734370137.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/peptic_ulcer_treatment_nice_guidelines.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_off0000f5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F1 5448 bytes
SHA-256: 4be58911f9c043ceb08a66d900d5be19e1e7edd900fa6233de707d8e301a4489
font_01_sfnt_off00010860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10860 11284 bytes
SHA-256: a25fa3096b353bb226045bf283edda8c355cb5cae1677512b508681a66b31d00

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