Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e9f7154148cab0…

MALICIOUS

PDF

72.0 KB Created: 2021-03-23 20:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8cf67485f3e06d856cd4167eb6b18ced SHA-1: c0499d6bf901e846fcdf6564dc4eb0d18d0a8857 SHA-256: 26e9f7154148cab07fb564cb5998f407989fa7fbbdd2a4eba7aaa5d97034e78f
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 0.9993

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://leonvi.ru/strik?utm_term=army+weapons+qualification+card PDF link annotation
    • https://sifobidegi.weebly.com/uploads/1/3/0/8/130874382/5626947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_60413e6906157.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/nomibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467273/normal_602f93d71401d.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/3892135.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/aUtgejf/best_golf_hitting_mat_and_net.pdfIn PDF document text
    • https://zupevinar.weebly.com/uploads/1/3/0/7/130739631/lozadago-dakewawajigum-tofunak.pdfIn PDF document text
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/rotis.pdfIn PDF document text
    • https://wixiwifutavoma.weebly.com/uploads/1/3/5/3/135301275/wujig.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/7616656.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/bIqbifQ/free_60_s_70_s_music_downloads.pdfIn PDF document text
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/kodapesiz_miwojajimakate.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/mDOEtje/nfl_fantasy_football_rankings_ppr.pdfIn PDF document text
    • https://gonibulurigudum.weebly.com/uploads/1/3/0/8/130874364/607642.pdfIn PDF document text
    • http://vatamulejuvovi.22web.org/terraform_aws_lambda_function_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gomaxuxibofetap.epizy.com/chuyn_i_file_hnh_nh_sang_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c6efd8-52ba-4de3-93a0-7967fd2bc839/57360496370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a70a626-2a7e-4849-a3fb-b4636a58bbd4/tafetusipudujedekobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6fdd876-e34f-4ea5-aad2-86aa3b972b7d/42647433244.pdfIn PDF document text
    • http://zajonosexerubi.epizy.com/fivalokejevojofazeseva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb86964c-3d85-4278-a749-734e15a83f58/i_hunt_killers_chapter_1_summary.pdfIn PDF document text
    • http://kivazitegolaluz.rf.gd/cahier_des_charges_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6412f50b-64e3-4200-9fac-4468514dbfb1/talubokimup.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_off0000dbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBA 5612 bytes
SHA-256: b16d4aef9522e7797a34f31a52a9972db00541839333c95d276765792430b770
font_01_sfnt_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 10620 bytes
SHA-256: b9e11adf6a82168966c8d665518c46cefc889b3dc758486d3f43022a6ada85f0