Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ca8f8d5febda61…

MALICIOUS

PDF

69.5 KB Created: 2020-12-27 04:00:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9a2d80b555b819ef467352b50d3cd34 SHA-1: b579a83bb981efe8b51804f5decca3b25106674f SHA-256: c6ca8f8d5febda6152a9ec54af3013c7be473d581456d98f7a55e7c42d414704
186 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a specific product lure ('Balenciaga platform crocs for sale') indicates a targeted phishing attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://trafffi.ru/aws?utm_term=balenciaga+platform+crocs+for+sale
    • https://voligamaxe.weebly.com/uploads/1/3/4/5/134512074/xaririv.pdf
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/de7aee9c075.pdf
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/3626760.pdf
    • https://cdn.sqhk.co/vakanaju/fsjbvic/20029421839.pdf
    • https://zomutelisofo.weebly.com/uploads/1/3/4/7/134712892/kefidol.pdf
    • https://wawanuxofidote.weebly.com/uploads/1/3/0/7/130775818/1099324.pdf
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/joterute-xivibiwawukarux.pdf
    • https://zowatiloni.weebly.com/uploads/1/3/0/7/130739934/6488009.pdf
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/6ed839e8.pdf
    • https://vufosaxirit.weebly.com/uploads/1/3/4/0/134018891/7326257.pdf
    • https://kajavowonedefa.weebly.com/uploads/1/3/4/8/134858644/somuzuxoxuna-favedujudo.pdf
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/zorejezakisadub.pdf
    • https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/adb752.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d13e.bin
7188ebee4ba095fcf5279e530f7afdad790b27975f4cd9f87c211a77b7004764		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD13E 5384 bytes
font_01_sfnt_off0000e37d.bin
8ae911de7ead2383fd3290fcd596330e4feb11bc00111cf641c109a211d2e31b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE37D 11024 bytes

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