Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a2e6efb02d5097…

MALICIOUS

PDF

76.4 KB Created: 2021-03-11 01:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9df54df0da7a6192431056473cec3d09 SHA-1: 2350d245d7e326036a89c29138f6e809764ab9a3 SHA-256: b3a2e6efb02d5097d6098c7bb934ab3ded9ef9709a9660e282d540e7d11bf919
224 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is part of a link farm and uses urgency lures, suggesting a phishing or malware distribution attempt. The presence of an external URI pointing to 'nipisod.ru' and a critical ClamAV detection further support malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/strik?utm_term=fedex+customer+service+email+address+singapore PDF link annotation
    • http://vovuzug.22web.org/attitude_shayari_image_free.pdfIn PDF document text
    • http://zobabikox.medianewsonline.com/graco_ultra_max_ii_695_pump_repair_kit.pdfIn PDF document text
    • http://delibopujex.iblogger.org/3823419243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_5fdae2ae3610f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417988/normal_5fd20594acba3.pdfIn PDF document text
    • http://roralopokuzej.22web.org/ferajitusuxodujapedar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379841/normal_5ff9fbe86db14.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/sixolose/minikudenabuf.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/xenube.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/85327860744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d23817d-9323-4eaf-a025-0f0d8d50e625/final_fantasy_xv_ps4_trophies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67db3d00-1ad1-4e68-8643-93a5f731d11d/standby_letter_of_credit_bank_guarantee.pdfIn PDF document text
    • http://talaxevavilur.rf.gd/free_ebook_cookbook_template.pdfIn PDF document text
    • https://fb1cd387-549b-40f1-a5a4-67fd65d29bb3.filesusr.com/ugd/4200b4_e21bbd6fe4984ab7a872bc4ad71b4125.pdf?index=trueIn PDF document text
    • http://jagesaba.epizy.com/coreldraw_2018_full.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/jibitaw.pdfIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_545c01c1fb4d4ebe984e9aa92c06f1df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/angular_7_portfolio_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4476108b-74bd-46a2-ae30-6a1c4cf3faf8/how_to_wind_a_bobbin_on_a_necchi_sewing_machine.pdfIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_0511b90068504223ba651daab83ff2ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/489422ac-421a-40c9-81ca-e9e58249f65a/buxeka.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/how_to_structure_a_story_ks3.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_off0000ec6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6A 5476 bytes
SHA-256: aef98699691afe9a1a52310fa5fd66678f1b2ac084916422a163740310c16e5c
font_01_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 10908 bytes
SHA-256: 03562ce1cf3b4f3f17e9d7a698b4668fec843f59ef0ac9469695ad87cc92b144

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