Malicious PDF — malware analysis report

Static analysis result for SHA-256 2998997d645aaeda…

MALICIOUS

PDF

101.1 KB Created: 2020-12-20 05:33:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6dda626d22b4efe546d3d29ad505776a SHA-1: 2693ff72a05ca3646bf16b5ecbf53a9906c97e6b SHA-256: 2998997d645aaeda823f57f41c72ae8859f594493e0878939219454bdf333208
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting and a suspicious domain ('traffset.ru'). The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users 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://traffset.ru/strik?utm_term=swede+vegetable+nz PDF link annotation
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/pinawe-jumemukibiw-takatin.pdfIn PDF document text
    • https://sivamodinuna.weebly.com/uploads/1/3/4/7/134762665/fuziji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8750cceda51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445864/normal_5fa5a0e28ca07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502563/normal_5fbea29e2ea2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394062/normal_5fdea0acd6455.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/0eb82e50841bab3.pdfIn PDF document text
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/dawozojefuxekizeben.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487916/normal_5fcc8cd950cb8.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/5a6de7b6-4f9a-46bf-b40a-692704b20356/32860241739.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b3a8405d5340f34a87f2/t/5fd6028fc4373837b900bb89/1607860880262/87797231491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ae149f-cb70-4f13-b4dc-b750f8278731/20305942453.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015711.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15711 26904 bytes
SHA-256: 1f67269d15a635b747305d190a7a1ebd970fc8f9dcbdacbdcaab48533ab2e535
font_00_sfnt_off00011b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4C 5164 bytes
SHA-256: c1f41358d46cf71f3565d068d63e89a4f9794cba5b864e429a239a8ab0eb1a3a
font_01_sfnt_off00012d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D11 12836 bytes
SHA-256: b46885e03c85ae0488f4e5d30f2e36dbc338c4188adb003237634b081d7fa9e4

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