Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcf3a777f33e572…

MALICIOUS

PDF

60.9 KB Created: 2020-11-18 04:02:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c7f9d14925ecea668f8568b230a69662 SHA-1: dc5febdebffa1531efe45f6eb0af56151f05538e SHA-256: fbcf3a777f33e57243680463a0680cc2f5204ba55e06f5c5f5810119073b2c61
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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://traffine.ru/strik?utm_term=mile+ho+tum+humko+tony+kakkar+mp3+do PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408001/normal_5faf66fc27a87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5f91c71a9f150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_5fa22cebacc79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380858/normal_5f9912daa8f40.pdfIn PDF document text
    • https://lafibovuvi.weebly.com/uploads/1/3/4/6/134653173/bopiriz.pdfIn PDF document text
    • https://dufejubodumafeb.weebly.com/uploads/1/3/4/4/134444341/cb9da975f2dd53.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdfIn PDF document text
    • https://gumiworawogulaf.weebly.com/uploads/1/3/4/3/134356348/leriseb.pdfIn PDF document text
    • https://mubuwejazanewa.weebly.com/uploads/1/3/4/5/134585617/7835b80961b31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415546/normal_5f98cf0c1444a.pdfIn PDF document text
    • https://vagibize.weebly.com/uploads/1/3/4/6/134618654/nobaro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/plc_programming_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f6a7790-c66f-48be-9ade-5142681c782a/15378379783.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/alimentacion_en_el_embarazo_oms.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_off0000b06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06F 5356 bytes
SHA-256: 7ac00e30d63b24d59fb410f98ef8b2e458a7fc1397a0fc3539908396059300af
font_01_sfnt_off0000c286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC286 10664 bytes
SHA-256: 4ed53f012b67c95e028b78b12b58040dd71bf4eb8a190a2363c3ff695fca2291