Malicious PDF — malware analysis report

Static analysis result for SHA-256 47854c23f5ece0a6…

MALICIOUS

PDF

67.2 KB Created: 2020-12-18 04:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ba0768c83cf70c9721d06ef6aa1d9074 SHA-1: 8a67cf784cf239408aa0da60d49512e5f03d0b59 SHA-256: 47854c23f5ece0a6ee011542d778e8aa966afb90761d37caa4e66c82ee1c7ccc
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a known malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of embedded URLs and the redirector link suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://ggtraff.ru/aws?utm_term=adaway+host+file In PDF document text
    • https://cdn-cms.f-static.net/uploads/4482636/normal_5fba29b14d34b.pdfIn PDF document text
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/jagekati_nusazaxa_sepaxilebelu_sapivepewod.pdfIn PDF document text
    • https://xelixaxoso.weebly.com/uploads/1/3/1/4/131407481/3719740.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/4682850.pdfIn PDF document text
    • https://xuwosanilenerev.weebly.com/uploads/1/3/4/9/134900173/668485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414164/normal_5fd3c0ac10a04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5fa4242040abd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf4e3f0-cb44-46c4-948c-2a6f5fbddd8a/sebibexelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed5adc2-ba2f-4ee3-a293-2486bc54d4db/vertigo_2gb_mp3_player_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b281f849-36ab-4a00-b3e1-139a1c15e974/68875559107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162bd27d-15e3-4f61-bbd1-a3d923164c91/34244140268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b434d6e-ae5e-42cc-815c-ab7ee4ed840b/stormbreaker_replica_metal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d5c488c99b6d37c929de/t/5fcc0dea5177ea328caf6e40/1607208427085/jikulugoxasadewev.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_off0000c951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC951 5084 bytes
SHA-256: 31d2e5f68fe4288c7a8453f5371ba46f1a5e6fd0605bfa5845322d159ed6d29b
font_01_sfnt_off0000dab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB8 11172 bytes
SHA-256: 1fd9a0e5990a034fdb37cb11fe226b09372a3058e328ad7daf6854fad5c78b2f

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