Malicious PDF — malware analysis report

Static analysis result for SHA-256 227e1314a3c28cdc…

MALICIOUS

PDF

82.0 KB Created: 2021-06-06 07:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e71ea810e80f5b8f2caa53818303509b SHA-1: 404fc4cf168878d02176da0b86cb973965a5f73f SHA-256: 227e1314a3c28cdc1379ef0c0af24bdeb0f734e7d39c111372e6ab0114d5adc9
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, directing users to a suspicious URL (https://drafthe.ru/pbw?utm_term=is+british+royal+family+rich). This URL is likely part of a phishing or malware distribution scheme. The presence of multiple external links, including one to a PDF hosted on Strikingly, suggests an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/pbw?utm_term=is+british+royal+family+rich
    • https://cdn-cms.f-static.net/uploads/4376374/normal_602ec134e2361.pdf
    • https://gafukarufigak.weebly.com/uploads/1/3/5/3/135309608/df7f64c3620e.pdf
    • https://jevizaja.weebly.com/uploads/1/3/4/8/134869407/gejuwofevip.pdf
    • https://static.s123-cdn-static.com/uploads/4420441/normal_5fc7a0de44c29.pdf
    • https://buvuramuva.weebly.com/uploads/1/3/4/3/134330057/ruxuzepuxujuz-zugasimulam-mofudigizo-xetidode.pdf
    • https://static.s123-cdn-static.com/uploads/4480142/normal_5ff5ed0f7b52c.pdf
    • https://wufopuse.weebly.com/uploads/1/3/5/3/135300065/5311857.pdf
    • https://cdn-cms.f-static.net/uploads/4381536/normal_6034220017a61.pdf
    • https://static.s123-cdn-static.com/uploads/4460966/normal_6004b83e03704.pdf
    • https://ripafikumitepi.weebly.com/uploads/1/3/4/6/134622323/7755d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/307e5e26-8ee0-423a-bd57-a330b87e937c/58750405818.pdf
    • https://uploads.strikinglycdn.com/files/63cf1c6e-adb9-449a-a832-43b90fecda5c/18915290583.pdf
    • https://uploads.strikinglycdn.com/files/92f4b624-9ff4-4d09-82bc-2e8d3304c058/distance_displacement_speed_velocity_acceleration_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/014f3732-bdf7-4fdf-9eca-eac3740df932/face_reading_in_chinese_medicine.pdf
    • https://uploads.strikinglycdn.com/files/f951e184-1458-4e53-ab43-c7c7c9f0d461/43986827694.pdf
    • https://uploads.strikinglycdn.com/files/f7299c8c-4da9-4ddb-8a45-dbf8a48289de/13786636606.pdf
    • https://uploads.strikinglycdn.com/files/fa2f59c7-cd91-4430-8d0a-563fad2eb770/8195930322.pdf
    • https://uploads.strikinglycdn.com/files/f3959aae-7c97-4017-aa36-493c6a9c5abc/taco_bell_menu_nutrition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101e0.bin
fc58216a226f9dbd95ac8dd8e12ae83e61fa75ae366845a565d9f51f67741342		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E0 5300 bytes
font_01_sfnt_off000113cc.bin
f5b12c0e1548027d33d2752d428dcec6282291d70f3c1a3553dfa84c07c4d9d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113CC 11528 bytes

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