Malicious PDF — malware analysis report

Static analysis result for SHA-256 22354b4d47f73476…

MALICIOUS

PDF

67.8 KB Created: 2020-12-18 05:11:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7d31a257415d06b103ae71fc155385fe SHA-1: 784bf619133151b14280515282c3b096f6b8a945 SHA-256: 22354b4d47f73476e3ade31b7423a75c8698c04788f4007722a1c1c96a2fa236
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malicious redirection domain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a link farm on disposable hosting, indicating a malicious intent to direct users to potentially harmful content. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=beretta%2092x%20performance%20gunbroker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5fd0f6bba89d7.pdfIn PDF document text
    • https://luvepuxoworusoj.weebly.com/uploads/1/3/4/6/134660421/kodinukiwekijobafis.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/sizalumevowabodum.pdfIn PDF document text
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/5576367.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/6535253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472503/normal_5fae5fd626124.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/dd778281.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/tuxewagiwawinib-nagesivuwap-tuvizufap.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/xuwumuzuvo-jidaduselame-soruroxixu.pdfIn PDF document text
    • https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/guwakulazuziwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0b544c89e1c4b8fbd6471/t/5fc10510173fb5383bc62685/1606485265443/wavukasovi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b2685c272238a81bcefb/t/5fd7537ad654060362e529e0/1607947131165/zidewa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5fbb7acac6192ab890b5/1606377405438/pepikar.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_off0000ca9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9C 5736 bytes
SHA-256: 012a689fd221fb553033629961f77b295e5fff1de67cd6796af164156ee89c11
font_01_sfnt_off0000de1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1C 10628 bytes
SHA-256: bdfb2261e164792cd339f355589d2970411ba39c9c04734fc1ce6d576232c02a

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