Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf0b44934939580…

MALICIOUS

PDF

66.6 KB Created: 2020-11-30 13:21:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 758df4d2f95bf4613de43478097fd329 SHA-1: 779c569d9c2fb43ce08456673f7cdbfa773ad331 SHA-256: 0cf0b449349395809196ca73835e15c14160a9d83577dfcf326fa57f0a4d84b6
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URL pointing to 'trafffe.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'ps2 emulator for android', combined with a visual download button heuristic, indicating a social engineering attempt to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=latest+ps2+emulator+for+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411252/normal_5f9b3667c0508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5f8d572b82917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_5f9a216ecc07c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_5fbe264fa1fb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_5fadd3c02ce8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f874b5744c1c.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/4519b9d7-8597-404b-82a8-0cfc134efb5c/dbx_pa2_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff1cb06-2ee7-4237-a785-85ada4c2bdf4/95989860167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9249ef3c-f87e-441f-ad99-1a61c006b5bb/napigapoxurasetuxoxaguku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf2a271-0da6-4e80-9244-93c805ec9296/27350426373.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd016c30a162e0c4c3cab/t/5fc317754e98326c0276c805/1606621047334/middle_adulthood_age_erikson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9921205e-5196-48db-828f-9cbb394e13ed/99647052398.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC708 5260 bytes
SHA-256: 3a8f9d0d29917242980f565b856574c1fc248392cc138d966bfe5318b29972df
font_01_sfnt_off0000d8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DA 10880 bytes
SHA-256: 80e3cfd5d7aeb55119d0f9376778a593a046007b46f17a39a8375f2aed6e6858

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