Malicious PDF — malware analysis report

Static analysis result for SHA-256 2232812e043d39b1…

MALICIOUS

PDF

74.3 KB Created: 2020-11-18 00:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cabc7043c5e76eaa3e8ba2d5b80630d9 SHA-1: 844ed3ced48f6563bf065851068ca0bf247c91b6 SHA-256: 2232812e043d39b168cfe1e293071eb92bf0c766fabe076c635b743467b42cff
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=technical+analysis+of+financial+markets+pdf'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates a malicious intent to lure the user to a harmful site. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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=technical+analysis+of+financial+markets+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5faf2c800c736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417306/normal_5f99b685a7428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5fa871e2e940f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f8d7f9f4fb97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/takateg/savakugofugen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9760d02a-2d9b-4951-8301-ed3b65893888/god_s_providence_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a5bdec-18f6-4fc0-82b1-54bc77818300/73645201100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb1270f-f29a-40bb-8e03-af82f9dd35df/josijilokemuzabava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b727086-524c-42c9-8541-d84d9abbacba/books_for_7th_grade_girls_to_read.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/define_budgeting.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/ziwuxidujaligozotofe.pdfIn PDF document text
    • https://s3.amazonaws.com/timafatafej/2997522591.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2ED 5300 bytes
SHA-256: 79c22015a9376d9a223a3faa80ba175399dd67e49b7513b4380b10473867391c
font_01_sfnt_off0000d4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BD 10532 bytes
SHA-256: 017277133df542cda2d470ac2a3a73e262c62287632734bbed0f9942bf59b15d
font_02_sfnt_off0000f7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3 16544 bytes
SHA-256: 1b44218257806f750c7fedc2cca84b6b30ff477c2da870f9e14c0541087d9c9f
font_03_sfnt_off00010e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E16 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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