Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca77b57e92eac588…

MALICIOUS

PDF

71.4 KB Created: 2021-02-15 04:29:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b35ec7936750a263a970f893d12f78be SHA-1: 0964925d5006db51a50e4de63d77ae3a8289bf83 SHA-256: ca77b57e92eac58841614b583e883c479f3ebe44466e0db49f4320072437dc1e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=mill+ridge+primary PDF link annotation
    • https://roxuxafuz.weebly.com/uploads/1/3/0/8/130813852/8892e025e1216ac.pdfIn PDF document text
    • https://kigusokitog.weebly.com/uploads/1/3/5/3/135300221/tufijag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_5fd620ac53c86.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/hidhjjf/clue_board_game_rooms_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_601b8ea8bc740.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367937/normal_6005ae156b1fd.pdfIn PDF document text
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/bb1f00bcb334306.pdfIn PDF document text
    • https://wiwofuda.weebly.com/uploads/1/3/2/3/132303082/cab0b8ed3.pdfIn PDF document text
    • http://svoydvalend.xyz/bulunu9p6oc.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/bshg1hi/fubapusivepa.pdfIn PDF document text
    • https://gumosoxegobekij.weebly.com/uploads/1/3/3/9/133999275/9479085.pdfIn PDF document text
    • http://indital.fun/free_d_nealian_cursive_handwriting_practice_worksheetsizen1.pdfIn PDF document text
    • https://divulonuwuw.weebly.com/uploads/1/3/1/4/131482828/7aea7a9593e000a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_6029c9dabbaf2.pdfIn PDF document text
    • https://cdn.sqhk.co/bimeniwog/hcgieCA/hacking_meaning_in_urdu.pdfIn PDF document text
    • https://setovejuno.weebly.com/uploads/1/3/2/6/132682792/1309201.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/lepefi/sepisarowez.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/93662599295.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_off0000da25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA25 5208 bytes
SHA-256: e16db0dedaca05fb0f589a5068da6f6aa82fb7dd02280f76788945c623a61147
font_01_sfnt_off0000ebd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD7 10672 bytes
SHA-256: 609715698840afb69c27a8f5864f8954cd364ab15e6a5782504d7b5d5eeee7ce

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