Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f0092d9348c2cd…

MALICIOUS

PDF

70.3 KB Created: 2020-12-25 10:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6a42309fc1f612d54bda0b7975c639e1 SHA-1: 94546a9ca3c0f0ad37666577d8fbd518a29ff063 SHA-256: 08f0092d9348c2cd44cb83149e98be347568d77557c54b52d644fd58dd548bbc
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting and exhibiting characteristics of a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs, such as 'https://traffnew.ru/wb?keyword=thoroughly%20definition%20and%20sentence', likely serve as entry points to phishing or malware distribution sites, aligning with a spearphishing attachment attack vector.

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://traffnew.ru/wb?keyword=thoroughly%20definition%20and%20sentence PDF link annotation
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/vizeperuxowaxizik.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/4361480.pdfIn PDF document text
    • https://tenimevu.weebly.com/uploads/1/3/4/3/134315692/4975716.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/KShkIjd/globe_at_home_prepaid_wifi_review.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/jujawo.pdfIn PDF document text
    • https://kurajefofukagi.weebly.com/uploads/1/3/4/8/134895289/dimagixapo.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/c709a9ae-ce77-4f06-8d77-4a085f92b844/four_veronica_roth_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b776f6e-ee60-4391-a3b3-4153c02856db/xemeguzabixujezorunorago.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/workday_hcm_modules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de61cb6b-210d-4b80-8e1e-c447ad87a1b5/vovizugigetufuxikoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e1f5fc-b6fb-440d-bcec-caee54673be8/descargar_one_punch_man.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_off0000d828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD828 5336 bytes
SHA-256: 46520f26a78ae9cb7e54982c02f07533eaf68c4a3464ff1e5420d797486ae49b
font_01_sfnt_off0000ea54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA54 10108 bytes
SHA-256: 61dbd3b70f385530807fdf7f1312543ce166aa0af18c696faf2d30a91aea61df

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