Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae9ae80be1dca94…

MALICIOUS

PDF

76.8 KB Created: 2021-04-18 14:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d520159ec37d935fca1337267442810d SHA-1: 10fbabe2d239ac8c4b6920523b5e9ffc0788ab7b SHA-256: 0ae9ae80be1dca9409dca76733989d3f00527ac325de8c899fabd690b3186173
186 Risk Score

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 0.9997

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://vilenefex.ru/strik?utm_term=download+microsoft+project+for+mac+os+x PDF link annotation
    • https://dajilifu.weebly.com/uploads/1/3/4/8/134891154/2746e8480ec1a.pdfIn PDF document text
    • http://myluckywin.site/pizexadusejagkp7bf.pdfIn PDF document text
    • https://cdn.sqhk.co/xobakidanav/ibuhhkV/43137307090.pdfIn PDF document text
    • http://pokypka.xyz/12693541776zsia2.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/romumetal.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/ZSR5gdm/piano_virtual_with_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/dufimogemeka/Mijicjb/lunejagalowopapine.pdfIn PDF document text
    • https://cdn.sqhk.co/puwidebudojo/Htgjdid/criminal_case_game_problems.pdfIn PDF document text
    • https://tekopazaxalar.weebly.com/uploads/1/3/4/3/134348639/fidulamawatafu.pdfIn PDF document text
    • https://bebejumupetokox.weebly.com/uploads/1/3/4/5/134513190/39f5811c780ba65.pdfIn PDF document text
    • http://storezone.info/lifeafter_mod_apk_highly_compressedhgn7o.pdfIn PDF document text
    • http://fresh-ita.space/tipos_de_archivo_gestion_documental87bfo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_2199d4eb67504389a50ac9981c1e6242.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/83476510390.pdfIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_6da1a0af738c479dafe644cf418e22f3.pdf?index=trueIn PDF document text
    • https://aa700e4b-9450-4a85-8b7e-8c92ffe47626.filesusr.com/ugd/de972d_232e15e2fcb24dc8ab99897a21c571f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/gifapinilixob.pdfIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_346ee4aace854918bacb22364fcb9e6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/nulunabuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/pediatric_surviving_sepsis_guidelines.pdfIn PDF document text
    • https://ff87c8b5-ca28-4ac0-94ba-218234037d87.filesusr.com/ugd/1d4e4f_45c1610b53dd44c290641168c9a44d74.pdf?index=trueIn 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_off0000ebe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE6 5536 bytes
SHA-256: 71d5fe51203b60ac50614de001bc4e78d5baf3a7930ea9a29710d8928f53a3a7
font_01_sfnt_off0000fec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC6 11820 bytes
SHA-256: 3c9fbee378915a5444ef45c765d6946b335c8d20f7ca565025cb3677257cb1f9

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