Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0753d1c969a1ded…

MALICIOUS

PDF

79.7 KB Created: 2021-03-06 11:12:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 01ba0032125085805beb3d6050521d16 SHA-1: 9cbebaa16fa99fa2b16808a2aef28d7afd83dd97 SHA-256: c0753d1c969a1ded5c397eb56a057e5fb3bf2979d666f7bf6de7630f4ddf098c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9993

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://pelibifir.ru/strik?utm_term=jesus+calling+daily+devotional+2020 PDF link annotation
    • https://cdn.sqhk.co/tinipuded/ii86hcB/traducir_picaporte_en_ingles.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/wjdo5Rh/wewuzuwaxaxasojazixiv.pdfIn PDF document text
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/jugibekikeweliwibu.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/Nic3yha/dj_marshmello_costume_kid.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/can_i_get_premiere_pro_for_freeiy6h9.pdfIn PDF document text
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/sadunomunexoju_lipabakow_gunepavodevemal.pdfIn PDF document text
    • https://cdn.sqhk.co/tidaxetosi/ihajeyl/invisible_man_sniper_3d.pdfIn PDF document text
    • http://xtw2.club/dunejufukasetuwisozio3n24.pdfIn PDF document text
    • http://thepropheticapp.com/nice_guidelines_htn_in_pregnancys9xwg.pdfIn PDF document text
    • http://yourlivehelp.com/joramomumolozix5w7o6.pdfIn PDF document text
    • http://regsenatvumen.website/vovipoguxiku42pwv.pdfIn PDF document text
    • http://presentinsta.site/lab_safety_manual_templatengiz5.pdfIn PDF document text
    • http://rezotu.xyz/nosebilenisodibugujib8rf4f.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/gvq3jcp/draughts_definition_board_games.pdfIn PDF document text
    • http://tlgfree.xyz/58834165897ub6nh.pdfIn PDF document text
    • http://gufutaca1.xyz/414161228835ic9r.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/zijivevip/sodimitabuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8c5087-873b-469b-a0b5-5e469e0d3709/23983962661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42ba1c1-f472-4606-a7aa-1c723b85fa7a/25349676920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f01dec5-c8cd-4f6c-bbb3-dd2cf950d1ff/dazevuxudozuge.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/36475865953.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/12625450060.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/87137541490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c1a920-d88e-4b11-b279-dc57e4924cd8/jonulobemariretunefubo.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_off0000f9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BC 5436 bytes
SHA-256: 3977e2a21c3baf3dbaac39ef625cdbebc5d8f375092eacb8cd7fecfe593af6ca
font_01_sfnt_off00010c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C58 10760 bytes
SHA-256: 5a4ed5df49d182a5fc1e304b62e3463660c7005e44c9a4003395e7ae2b9074c7

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