Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5117b4a43c24adc…

MALICIOUS

PDF

92.1 KB Created: 2020-12-30 04:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a66e730305b7fe01949531be8e8ff5b5 SHA-1: 12d2d058c581e25c691e6c7f78e44b7b078485ce SHA-256: e5117b4a43c24adc0200262ed05da7ad24980d1894d9b9b961ebd0a527f80034
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, and contains numerous embedded links. Several of these links point to known malicious redirectors or link farms designed to host further malicious content. The document body, though heavily obfuscated, contains text related to song downloads, likely a lure to encourage clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=armaan+malik+new+song+download+mymp3song In PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/43c37fe7d6589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383445/normal_5f931a19b4993.pdfIn PDF document text
    • https://xigunokitipir.weebly.com/uploads/1/3/4/6/134615451/9039453.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/2115319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455672/normal_5fd7025a49837.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/divexikav/143153091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23dbfff2-85de-48d8-b2c2-adaddfdb8e60/idioms_in_fahrenheit_451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d19c45a7-c50e-47af-81ad-16ebb9c7f611/46858045902.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/18807619068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c882e0-3dd5-49b6-a2b1-ccc0292569c7/nolupat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4ccaaa-f228-4503-8b48-19b4e3b4aa3c/80m_antenna_limited_space.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb11432-3bac-4c52-89d2-915823e05f91/anime_fighting_simulator_fandom_codes.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_off00012833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12833 5692 bytes
SHA-256: 833e7293ae41754f287781c94091a09ca8f00cb967c2cca120f32cbdb392b045
font_01_sfnt_off00013b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9D 12248 bytes
SHA-256: ef251eb69b842d6a5fcb17ef119c70dda6a825b1e916118eab4bc9e33434631e

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