Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c7e5ac4cf66a9e…

MALICIOUS

PDF

92.0 KB Created: 2020-11-14 03:34:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aeb487744ba7b535cd1882100603d55e SHA-1: 111212ae4d8e8542f38745d26cba20cec97012b4 SHA-256: f2c7e5ac4cf66a9e789974478a991090396f08a6f5c5ca6016dbeefa0bcdd9d9
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://traffnew.ru/aws?utm_term=brigandine+ge+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489844/normal_5fa8e09958f73.pdfIn PDF document text
    • https://nixejovebomir.weebly.com/uploads/1/3/1/3/131380485/wekujatetorul_vedomekerati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_5fa93eb5941bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5f8aacb8459d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449766/normal_5faede9c21722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405184/normal_5f9bafc0e3dd7.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7775416.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/3f295ca1.pdfIn PDF document text
    • https://morizuni.weebly.com/uploads/1/3/4/6/134606759/4983203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f87845ddb48e.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/35b938e6-5d60-46e0-8c6f-d2f16f000489/blood_hunter_2020_dnd_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b59cab-4caf-4ebe-8e70-1f533dbd2388/bidasububi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8B 3696 bytes
SHA-256: 9f6f57a74dc328ea2aed797da0a56f36b51826f6f8a67c9e7c76bca0dfce55d0
font_01_sfnt_off00012cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB0 4832 bytes
SHA-256: e4002d33a88f1b3ae75e3c31c793503b13e1882e402f34e86da2b82ba4461f76
font_02_sfnt_off00013d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2E 11168 bytes
SHA-256: da2c2c4cfc473ef475cac237eb33b924c8d34ea7b08d920d4e30334969d48787

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