Malicious PDF — malware analysis report

Static analysis result for SHA-256 467fbae5cd896710…

MALICIOUS

PDF

72.1 KB Created: 2020-11-20 07:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3ff06ec22deeb01cd2e1d4ce95cc6c05 SHA-1: 730dcebfa5296fd6cc3d5d2a55fe317e2bcc5913 SHA-256: 467fbae5cd89671040225a6a137ee1126eb682c11a3e00fdc32959702b0c5926
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with many pointing to disposable hosting. One of the embedded URLs, 'https://traffking.ru/123?utm_term=overwatch+can%2527t+invite+friend+to+party', suggests a lure related to gaming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://traffking.ru/123?utm_term=overwatch+can%2527t+invite+friend+to+party PDF link annotation
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/fubigovuk-rukigepumipijoj-faxerexekebowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5fa0f8d0c95d6.pdfIn PDF document text
    • https://sopopubepomexak.weebly.com/uploads/1/3/4/2/134265445/325191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428061/normal_5f9da18a5fda9.pdfIn PDF document text
    • https://rinedasufuketon.weebly.com/uploads/1/3/4/3/134340565/4079691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_5faafd4dedb5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499622/normal_5fad2b85bc0c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420588/normal_5fa36d286380f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f8ff7cde6a66.pdfIn PDF document text
    • https://nubojubixuxo.weebly.com/uploads/1/3/1/4/131410311/3538618.pdfIn PDF document text
    • https://riramiseba.weebly.com/uploads/1/3/4/3/134369938/xozawozosoxal.pdfIn PDF document text
    • https://rewumakabaw.weebly.com/uploads/1/3/4/8/134856880/0af17a42.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/jeduzizonox/bash_the_computer_games2girls.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/ek_thi_daayan_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/1999515245.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/43320644255.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01D 5136 bytes
SHA-256: 893639fed7d7966c385901e1f745652d48ca2e14b8bca50f94c152531aa84ff4
font_01_sfnt_off0000e1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AD 10460 bytes
SHA-256: 276c9e886577e95da5a3a599bc005ee350a239caac9152585d64aae39c561146
font_02_sfnt_off00010566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10566 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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