Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43c09fd5474b2cd…

MALICIOUS

PDF

57.3 KB Created: 2021-02-20 15:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6c62fc86adb9a78ef0d5dd4f59e7c1b4 SHA-1: bc5840d65c1fb6b3919df4c0a8cdfb5c7f46efac SHA-256: f43c09fd5474b2cdc39436d91ee7b4d85aa8746997c5ec2a9dbf30d76a4078fe
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are generated SEO-style links, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs, such as maypoin.ru, are likely used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8591

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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/wix?keyword=mortal+kombat+x+game+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416923/normal_600f05b27d425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_5fe7c39129d95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483833/normal_5feb94937e5ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_601487e243362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381294/normal_5fc8b291d46d5.pdfIn PDF document text
    • https://tisawotaw.weebly.com/uploads/1/3/5/9/135993845/zekivuxex_dozurilokomumiv_xenujopoxonol_dizekufuxeximor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385424/normal_5ff34017bf8ad.pdfIn PDF document text
    • http://ig-mediateam.net/63437435465kej4z.pdfIn PDF document text
    • https://kujibolivobukib.weebly.com/uploads/1/3/1/1/131163991/nirokup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413125/normal_5fdd5c7047810.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368745/normal_5ff269c368bea.pdfIn PDF document text
    • http://petersikdar.com/xofafedinusavuzupomotifesqom8g.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/bosatasizuv.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/59da2a74d47c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pujixedigegogup.epizy.com/agents_of_socialization_family.pdfIn PDF document text
    • http://dakokaxawizepu.epizy.com/android_google_maps_api_key_programmatically.pdfIn PDF document text
    • http://waminakukivexo.rf.gd/zotonekigomoma.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD453 5460 bytes
SHA-256: edc96f032b41ddc8fcf3ffbbf7158622a12d6424de1fc64a2d90befcfed02737

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