Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1ab826ceba4691…

MALICIOUS

PDF

68.4 KB Created: 2020-12-06 07:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 113d3f88adce0558f4aff797711eb833 SHA-1: 18bf5b3c84fdce781ad2150f6ce26a9941f29336 SHA-256: db1ab826ceba4691fa82ccddc137103f2f1d03570866c96611d25f1df000b100
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The presence of a "Best Buy orange park" lure in the document body, combined with the ML classifier and ClamAV detection, strongly indicates malicious intent. The PDF_SEO_LINK_FARM heuristic specifically points to a mass of external links, likely for SEO manipulation or to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=best+buy+orange+park PDF link annotation
    • https://vivorewipaxuje.weebly.com/uploads/1/3/4/3/134365477/mijibopatevixugo.pdfIn PDF document text
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/busenimujuxi.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/tapalisizemef.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/2544388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_5f9782c7c61ec.pdfIn PDF document text
    • https://wesodopudo.weebly.com/uploads/1/3/4/2/134234684/8460372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461505/normal_5fb85afe45ce5.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/7cfd48a359c3a4.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/370567d5-e518-4dc5-8710-6264afdb6093/48145294908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a10c43-f316-4776-bf29-529a31a050de/torrent_pc_red_dead_redemption_2_fitgirl.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/21921206140.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/barthes_from_work_to_text.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_off0000cf26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF26 5312 bytes
SHA-256: 702b168f5f66c9341c4927ed105fc7be7c891b1c3b6b859bbb506d6c3429833a
font_01_sfnt_off0000e151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE151 10684 bytes
SHA-256: 50719981daed83bb9201d0201facf3217db0450a2d617669b48caa9eb52d7f6e

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