Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b74b6798f291ce…

MALICIOUS

PDF

62.5 KB Created: 2020-11-13 11:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3ec160af6573887582a7e7b72659df32 SHA-1: d7e84191c4221d9b145a6690020d7914d8295d3c SHA-256: c7b74b6798f291cee336d1f5e791ebe3923cd38700bca91c3f38b328492e7e15
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 0.9998

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://traffine.ru/strik?utm_term=asi+styla+%25C3%25B6zgecan+s%25C3%25B6zleri PDF link annotation
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/dasegalid.pdfIn PDF document text
    • https://fiselowozol.weebly.com/uploads/1/3/4/3/134366189/jitugasovekipaxuwiji.pdfIn PDF document text
    • https://nosokubidudat.weebly.com/uploads/1/3/4/3/134321305/zarisumonowexoletik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452863/normal_5fa08f3408f75.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/jajoxulabojaso/metformina_850_mg_para_q_sirve.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/sonic_flash_games_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc26437b-034e-4319-83fc-33ca50095ce9/girl_online_on_tour_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bac3ea6-45a8-46ea-bdb1-49bc53f26922/engineering_mechanics_dynamics_6th_e.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/91555610054.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/88752028608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1224c8-d4eb-42f9-8790-9a521e335935/libro_la_vida_de_los_doce_cesares_pd.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/pezalubapawulosutewafu.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_off0000b649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB649 5244 bytes
SHA-256: 2eb5d844c2e4d8b0b6b1312d8b15839e57d8be18ad4a72256b34df676a3feac0
font_01_sfnt_off0000c806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC806 11652 bytes
SHA-256: 3282bb754188709f131d14bb0fb289d32dd7ce83b01f4c83c76549c80133e7f6

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