Malicious PDF — malware analysis report

Static analysis result for SHA-256 a11d0d17f157f89e…

MALICIOUS

PDF

78.3 KB Created: 2021-03-01 14:03:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e50d583a399aec3048a6f97f8a40d736 SHA-1: 9911a041883ca9e519782dd383fd619dbed5548a SHA-256: a11d0d17f157f89ee4223096b41edbec25757a33cfb3d8314dfc337ee53136c3
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards malicious intent, likely to redirect users to potentially harmful 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
  • 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://xajibur.ru/strik?utm_term=review+jlab+epic+air+sport PDF link annotation
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/wavaxivu-zoziraj-nejimurezaj-vamupejexeru.pdfIn PDF document text
    • https://rizipopene.weebly.com/uploads/1/3/5/3/135316145/jesozofaletoja.pdfIn PDF document text
    • http://bedating.online/720273610597mv70.pdfIn PDF document text
    • https://jafelabuz.weebly.com/uploads/1/3/1/3/131398525/buride.pdfIn PDF document text
    • http://amsidgi.xyz/formulierungen_fr_charakterisierung_englische42kr.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/8832946004.pdfIn PDF document text
    • http://storeyou.store/17293122100e0iul.pdfIn PDF document text
    • https://jabizujosewej.weebly.com/uploads/1/3/4/5/134584717/ceedeb1ea632bc.pdfIn PDF document text
    • http://bitcoinov.site/81256731535d2r77.pdfIn PDF document text
    • http://copyrightnotice-ig.com/98879114435av6g8.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/76359147926.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/creation_club_content_not_ing_skyrim.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/xejeronavi.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/xunivinezodifa.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/vijudizexi.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/a_change_is_gonna_come_aretha_franklin_lyrics_traduction.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_off0000e943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE943 4984 bytes
SHA-256: 235f34519f8faa615baaacde86385e885dd45e40e71099d302b85311e383ba3a
font_01_sfnt_off0000fa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA54 10468 bytes
SHA-256: b0458d1670bfb80bead3c9711e703b7b5e01a42eaf2baebe8322bcc555c7011c
font_02_sfnt_off00011dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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