Malicious PDF — malware analysis report

Static analysis result for SHA-256 295089ad805f2376…

MALICIOUS

PDF

91.9 KB Created: 2020-12-20 02:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 357566dfa3c1c474ca79f1e6df91fe42 SHA-1: 03bfbffe424c40f279f610af2cff2595e8b285dd SHA-256: 295089ad805f2376b7e51c662826febb57abdae4a827eb117b7eef695362cc07
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains embedded URLs pointing to suspicious domains, including one that appears to be a redirector. The document body, though partially corrupted, suggests a lure related to unit conversion, which is a common tactic for phishing or malware delivery. The presence of external URIs and link farm heuristics indicates an attempt to direct the user to malicious content.

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
  • 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://traffnew.ru/strik?utm_term=yards+to+feet+to+inches+chart PDF link annotation
    • https://xuxewisi.weebly.com/uploads/1/3/4/2/134235501/gabipetofofod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417140/normal_5fd0a5934c284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408993/normal_5fd33830ae4e8.pdfIn PDF document text
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/f1bddf0a17c80.pdfIn PDF document text
    • https://podesasi.weebly.com/uploads/1/3/1/4/131437149/79c6568.pdfIn PDF document text
    • https://nipifofopofeduv.weebly.com/uploads/1/3/4/3/134338269/2921086.pdfIn PDF document text
    • https://vevinobe.weebly.com/uploads/1/3/4/4/134487659/rekarariv.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/kawotexulozax/buresuvorimijekikapupeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eecb1b01-d734-41c9-b6db-5ba105acb37f/yakety_sax_public_domain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f6b3c0-9bfc-4717-a8cb-4557f3ca7522/foxud.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/prime_video_amazon_endgame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891a40a7-8a45-4fa8-9fa5-55ce59ea5a19/51219536540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f419c229-b75f-48ff-af8a-adcea66a42d7/25186017221.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_off00012dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD4 5036 bytes
SHA-256: 4cca616bc707d397a408a5357a8e9302d85dadd50a7b672ffe9ca4bb8b71a855
font_01_sfnt_off00013eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EEC 10420 bytes
SHA-256: 4288b42f4747ae9df3a860b26d59b5165f1c6101d4dc9e541f9034e1fbff23fd

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