Malicious PDF — malware analysis report

Static analysis result for SHA-256 8440312f193c8f16…

MALICIOUS

PDF

73.1 KB Created: 2021-01-06 19:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 12e0f24597603764c7bf4a99f4285169 SHA-1: e8d42f3ab51450fc255476a0aef1cca93a774966 SHA-256: 8440312f193c8f16897deeb81d7010cab4265928751a871ae682554a75bd2048
244 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a link redirector and a link farm. The presence of numerous external links, some hosted on disposable domains, suggests a phishing or scam attempt designed to lure users to malicious sites. The ClamAV detection further supports its malicious nature.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=shiva+third+eye+open In PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/127653.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393345/normal_5ff1d4a7a3c55.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/eghvkii/us_civil_war_map_with_border_states.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/5149968.pdfIn PDF document text
    • https://petabururumeje.weebly.com/uploads/1/3/4/9/134902787/b858866.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/vekivowep_buxezami_josaxif_sunurojixuvuxid.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/lepefi/iccrc_retainer_agreement_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/351faf36-bdf2-4b5c-b7c1-cc6b20d07bbf/29125225268.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/meiosis_reading_packet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640bca4b-e542-480b-bcb1-731ef61f2b8f/disizegudataxopinerokiwaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/784b2f0d-6382-4a17-8878-17ac13615d3b/microsoft_flight_simulator_x_auf_win_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/334556cb-f595-4dee-b9dd-f33c5c1f68a8/flint_and_walling_submersible_pumps.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/happy_new_year_tamil_song_audio.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_off0000e20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20C 5100 bytes
SHA-256: 82bc0ea1729c8a9916fd82f980a493f328e2fe24b566e66a38bf79e2851de862
font_01_sfnt_off0000f370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF370 10684 bytes
SHA-256: 2cc2bfa6d21adfc0446cfe9cda4a2c583daac07af78e219e274945edb784d739