Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c02cea6150a5585…

MALICIOUS

PDF

115.5 KB Created: 2020-12-01 07:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9a3f815845b464bfe3a83deb3999bc5b SHA-1: 73d155f87f2b4321ffc218eb6b299ddc20a07c5d SHA-256: 8c02cea6150a55852e83f758de6c97eea5a2aa68a58d546539ddeaa1062cbde4
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, indicating a link farm strategy designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs and the PDF's structure point towards an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?utm_term=play+their+hearts+out+pdf PDF link annotation
    • https://fupiwopogewexab.weebly.com/uploads/1/3/4/5/134506550/diluten.pdfIn PDF document text
    • https://rakikamizop.weebly.com/uploads/1/3/1/4/131437254/labomijimediteda.pdfIn PDF document text
    • https://ponixojezunuto.weebly.com/uploads/1/3/0/9/130969897/binugavun.pdfIn PDF document text
    • https://raserigu.weebly.com/uploads/1/3/4/7/134725151/6d6154a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5f9782a7a19df.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/443943.pdfIn PDF document text
    • https://wunimebi.weebly.com/uploads/1/3/4/3/134361225/ce7662e9ee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480889/normal_5fa936b747213.pdfIn PDF document text
    • https://furobafesenere.weebly.com/uploads/1/3/4/6/134626717/c9b7f79c64e61e.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/bdbcc5a6-b4a4-4225-94b6-8ad3ff41bac9/calculo_diferencial_e_integral_granv.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/bitibepikuvovuzile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3455374d-c392-4c57-b691-f885174a60b4/eyelash_extension_waiver_form_templa.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_off000186aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186AA 5232 bytes
SHA-256: 7112bf84723a886dd3c5ae3147359fbfb540e4d4bd4db3495474f43179a08dce
font_01_sfnt_off00019878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19878 11948 bytes
SHA-256: e5827f3f4f1b301cf938f40172912285947ab3560729648909df24a037a7b92a

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