Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9675d56aa8cd81…

MALICIOUS

PDF

80.0 KB Created: 2021-03-27 23:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1cf459bf195fd62f0168ee2924e40b7a SHA-1: 8eae524defdd8d6939715c9f6b750051773a8c61 SHA-256: 2e9675d56aa8cd81316455a5827d81b0c1e8c6965885c27b370a47e3fb27e4ae
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to contain keywords related to tutorials, which is likely a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=opencv+tutorial+c+pdf PDF link annotation
    • http://pujuburebofig.iblogger.org/valagemuwezivalusij.pdfIn PDF document text
    • https://wakezibi.weebly.com/uploads/1/3/4/6/134695128/1604012.pdfIn PDF document text
    • http://rugozuravonabib.22web.org/pride_and_prejudice_2005_watch_online_with_russian_subtitles.pdfIn PDF document text
    • https://sasurejif.weebly.com/uploads/1/3/5/9/135966776/tuwosofemasutitug.pdfIn PDF document text
    • http://maxetuwugek.iblogger.org/wogenelifenelenek.pdfIn PDF document text
    • https://dovedesomubax.weebly.com/uploads/1/3/4/4/134487211/357c22ebf527f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lujijodexel.epizy.com/25748640118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8f79ca-3af3-4d22-b45c-a53a72cb38df/lerediraximiwuxexir.pdfIn PDF document text
    • http://dotejujuzobok.rf.gd/fobobozusowasonavobejo.pdfIn PDF document text
    • http://memokos.epizy.com/21624567709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f1a17a-55ea-4e77-8003-f664afbab91e/23977022877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6fc4bb6-510e-4913-b659-8a4f4a152f72/diccionario_traducir_de_espaol_a_ingls.pdfIn PDF document text
    • http://ziwibavufu.rf.gd/ralakosubowowejeramatu.pdfIn PDF document text
    • http://mijugavagi.epizy.com/garevavejixip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683465b8-5c31-4812-8062-d633be79645c/18300392393.pdfIn PDF document text
    • http://zujazeku.epizy.com/alice_merton_songs.pdfIn PDF document text
    • http://vatoduk.rf.gd/class_12_biology_syllabus_2020_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03701dbd-7d2d-4da5-881a-5798b8c60443/80247538174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92970366-78e5-4eab-8490-12ca8d8f4760/zugaxikus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD675 10708 bytes
SHA-256: 489c2d207d00b467c9fde698b2319afd31322a7b709031784a3c80095cccd3e4
font_01_sfnt_off0000f9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EA 5060 bytes
SHA-256: d2f90a239ae80b358128e6e1d1283cbff1b74b421157ef8a7ae3c61777cefb25
font_02_sfnt_off00010b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B36 11132 bytes
SHA-256: bac07e16c6a22668bb7e63b3271a3e2453bf7989f8c475fc6781bad6cf31c885

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