Malicious PDF — malware analysis report

Static analysis result for SHA-256 322e5d42c0cab5b4…

MALICIOUS

PDF

78.0 KB Created: 2021-04-06 04:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 038b61839dead9bdab8b3f939d1aad62 SHA-1: d1d2c110fb0442b37780f1cd3dd8cd6510df8922 SHA-256: 322e5d42c0cab5b4b8ba6e1bb16e5487e4c8715650330bc906ff13c3d68696f3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The primary attack pattern involves directing users to potentially harmful external sites via these embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=the+young+elites+characters PDF link annotation
    • https://wigojakumadofef.weebly.com/uploads/1/3/1/6/131606024/rerukimus.pdfIn PDF document text
    • https://cdn.sqhk.co/wovegase/UboP6hF/new_ringtones_free_download_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/Y5HjjXu/nufufibibopajudu.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/iahbmjh/6327036322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371536/normal_5ffcf735498cd.pdfIn PDF document text
    • https://jizidetaji.weebly.com/uploads/1/3/4/6/134626841/9416768.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/fijhbij/entrepreneurship_development_by_poornima_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kapideto/dKyHvky/82380222433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375908/normal_602cd6ea21561.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/VPx5puQ/povizive.pdfIn PDF document text
    • https://cdn.sqhk.co/bibikodazit/idviiie/43888088653.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/Cbhfjek/37651613003.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/fepemorabiwijutinak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420451/normal_602f936512d4f.pdfIn PDF document text
    • https://cdn.sqhk.co/sajixobuko/gb4ha1V/pogromcy_plam_wroclaw.pdfIn PDF document text
    • https://cdn.sqhk.co/juxezijafoz/iibhhib/27906337989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458634/normal_5ff1e613aac1f.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/jjjLcjf/10878342166.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/hjdgdf6/lil_yachty_freestyle_beats_1_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421787/normal_5ff917c50cd94.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/jighfOM/kopawefeje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_3af48b076ee941f4bc2ef7372d8714c4.pdf?index=trueIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_bcb424db49f54e6d855f47e250dea098.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_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 5112 bytes
SHA-256: 2d1dae2f48a1deb54919b403659a98282b06b12c10f0f75f08a8dd47f37bfaaf
font_01_sfnt_off00010552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10552 10496 bytes
SHA-256: 2c07323c0e18f7566baf05d8d53b2ce2f0a5b41c4891d3dcee5f0e3fd11f8cdb