Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb8fbd38e82bbde…

MALICIOUS

PDF

70.1 KB Created: 2021-02-20 21:33:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 18c80c24e0ef4a33a2aa324d04722372 SHA-1: 52d8dc3d7f0c5c633a086f19f6bfd264aa62dbe5 SHA-256: 6eb8fbd38e82bbde04ab6b6f4fff5c78d922f10a4bce54d4fb2ead130823ac8a
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://maypoin.ru/strik?utm_term=how+to+remove+alarm+in+timex+expedition+watch PDF link annotation
    • https://cdn.sqhk.co/kosadara/hjicfH9/jixerezeviwojob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405903/normal_5fff49ee49a3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393638/normal_6015cb219510f.pdfIn PDF document text
    • https://cdn.sqhk.co/mofinopedas/ige4yUf/27579615035.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455195/normal_5fcc094e63373.pdfIn PDF document text
    • https://lixojubenolida.weebly.com/uploads/1/3/4/3/134375882/94baca65.pdfIn PDF document text
    • https://cdn.sqhk.co/muzubasiwu/hasrcic/bow_and_weapons.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402951/normal_5fe0a9a0b677d.pdfIn PDF document text
    • https://cdn.sqhk.co/tigepukeri/X9nR03t/high_school_simulator_2018_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500893/normal_601a2af4e9fa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502245/normal_601a2c4f4660f.pdfIn PDF document text
    • https://batusuxejodasav.weebly.com/uploads/1/3/1/8/131857782/nasusurozep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493553/normal_6018dd44544e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD282 5316 bytes
SHA-256: 1f7b3ae804a71c703e13bc667a64c5b2cf694b413c87113b88437b5b594ea6bc
font_01_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 11676 bytes
SHA-256: e7e098de84442cc38ccf1c1871c647156edf0075a7ccc937c0b77d0ff24d5e91

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