Malicious PDF — malware analysis report

Static analysis result for SHA-256 3138ac7641b9b344…

MALICIOUS

PDF

74.2 KB Created: 2021-02-22 08:59:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bce6ae5f92b1028e003d594028de1208 SHA-1: c53b86eecf114fe0d9057140b7852bbfda083800 SHA-256: 3138ac7641b9b344743b406a7d1222fb7301c1499bfdb668a88a613233fc1533
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or phishing campaign. The primary URL, https://maypoin.ru/strik, is likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://maypoin.ru/strik?utm_term=fun+run+boosterthon+prizes+2021 PDF link annotation
    • https://mofivekirupu.weebly.com/uploads/1/3/2/7/132740685/xobitaraku-forilileninuja-fevubakazojis.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/hivja5S/ent_doctor_nyc_open_saturday.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/crijGgd/nipotis.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/u6ihLTk/49452898587.pdfIn PDF document text
    • https://cdn.sqhk.co/delotijuw/ghjgfha/jotexowagozudigorosujamu.pdfIn PDF document text
    • https://joverukaded.weebly.com/uploads/1/3/4/4/134433057/744442.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/wghgdbR/47455476590.pdfIn PDF document text
    • http://kasuxifuk.iblogger.org/pokekowiluwa.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/dfSjfge/t_mobile_family_mode_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suniwuvujibo.epizy.com/29236452459.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/matematica_elementar_analise_combinatoria.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/rustoleum_cabinet_transformations_gray_colors.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/33481154083.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/dapewolataludog.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/hang_tag_template_illustrator.pdfIn PDF document text
    • http://ledolabufimo.epizy.com/lomagakenefinekiboz.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/grandfather_clock_movement_installation_instruction_manual.pdfIn PDF document text
    • http://nuzoniwetavo.rf.gd/zoom_g5n_used.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/58481522501.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/24228292213.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_off0000e731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE731 5136 bytes
SHA-256: 5f5af62c0969157e5d8819c47a8ac77d799397bd96e81e93201b9b0a023fd902
font_01_sfnt_off0000f8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B1 10344 bytes
SHA-256: 7d66396d8eb81f18bd4442b5f029b07f5b462bec90b5ae1ed81ea30d8fb682d0

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