Malicious PDF — malware analysis report

Static analysis result for SHA-256 373a3136434db553…

MALICIOUS

PDF

84.3 KB Created: 2020-11-21 16:02:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bbb8e5339eff3ea81365f6e09360a4fc SHA-1: 1ea1c2e2e2a943de1e211edb55b26f657c3f3330 SHA-256: 373a3136434db553a41883ef2574316e91160f53a5e8bd665eb1300ebe44b280
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The primary URL, trafffe.ru, is associated with a search query for game cheats, indicating a lure to attract users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://trafffe.ru/123?utm_term=cheat+engine+for+call+of+duty+mobile PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385434/normal_5fa0f9f92bc92.pdfIn PDF document text
    • https://xevavudexatowud.weebly.com/uploads/1/3/4/4/134401026/surokugolugi-nuxezixukiwojug-zodusesokisor.pdfIn PDF document text
    • https://jikubefu.weebly.com/uploads/1/3/4/3/134318914/vinob.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/wikurixobelu/poxobulivisowarupasosi.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/89748902605.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/betta_fish_wallpaper_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/think_central_math_on_the_spot_video.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/camera_360_lite_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/98554888438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44413373-6c8c-4ffb-9100-95129947756a/chrome_moly_tubing_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/lukajasijomevetatepamemi.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6C 6588 bytes
SHA-256: 746cda19d0a45b0d6108c63ff8192b2f88c2fff5e5937e692a7cb04b31166607
font_01_sfnt_off0000ddb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB5 2900 bytes
SHA-256: 9c84aca5171cf4522e1fd23f3e5391e17c8e645cdcb740b4c3036af6865bd014
font_02_sfnt_off0000e7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FA 5404 bytes
SHA-256: 1c61caa2f8f30319f3c586879741a3a22b2322fb0e7fdab818bb956a931538ae
font_03_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 1964 bytes
SHA-256: cf5f73628a2d0d47d4e11b31b79e7db8d012d26663e47e4dc9619f1f9cf10ad5
font_04_sfnt_off0001034a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034A 11252 bytes
SHA-256: a637826b655a59abe78af2a9deaf13d37e0e43c65c892491cdf7e38032cf5429
font_05_sfnt_off0001296e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296E 17376 bytes
SHA-256: 8059ce8fa16b5ad399ac9b6f5ff5334629ae01cdb084a5042a93f77fba894c7a

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