Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aea148273f5ea36…

MALICIOUS

PDF

83.2 KB Created: 2021-01-08 15:20:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f7da67c1dd7b2de8047883fae31e4394 SHA-1: d829c895da74b3eea5b99310de0dae0a59756b4e SHA-256: 7aea148273f5ea36f7588050922b2c08c6abbb4cfb40d528aa67c957e987e6b2
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 0.9997

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/aws?utm_term=interview+questions+and+answers+in+nigeria+pdf PDF link annotation
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/ruxozukozuvazu.pdfIn PDF document text
    • https://vakogiguwowokel.weebly.com/uploads/1/3/0/7/130775334/lebos.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/1157254.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455374/normal_5ff7ffcaa654d.pdfIn PDF document text
    • https://zutovabofilosu.weebly.com/uploads/1/3/4/3/134333865/c12e285a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d88974c-8cd8-41ca-a3b6-41ee96499f04/12550425084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b42d90-a493-4fc1-833e-c07aa84c5b61/great_mills_high_school_shooting_md.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ead9462-b47a-4998-b3fc-e8f10bee8655/rumirajerufato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ea48f9d-6b4d-4869-8ab6-10a21c264abc/easy_achievements_cookie_clicker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/514086bc-f19b-41ac-bb55-cfa535b27362/ferufufitagoboladusefokiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f3c399-7cfc-4119-ae64-dafcba0bb421/super_mario_bros_the_lost_levels_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4082f7-4cac-4e40-ab03-8bada6baeae8/11262599231.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_off00010ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD3 5392 bytes
SHA-256: 92ba4fdad03d0a9463ec75f7ff48bb5439648bba4b777b8bc3a3653a35085e24
font_01_sfnt_off00011d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4A 10092 bytes
SHA-256: 45a722d56d9ba75a34a8d64c127ce10fd3c1f14c080782f1a04657d8faf5ef09

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