Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0276f02b65e7fe…

MALICIOUS

PDF

81.3 KB Created: 2021-06-09 05:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d0dd018d974e9460a9bb28cb4932626c SHA-1: c8f855eecfd3ce3eb8fd2c39540a9796b9cbca07 SHA-256: 9a0276f02b65e7fe603b294bfe45ac894cd7d513a298ac76fccbdec7f172d37b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to 'ponafet.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, further supporting a malicious intent 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 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://ponafet.ru/123?utm_term=school+laboratory+design+guidelines PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485929/normal_5fde31d941deb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384045/normal_60004f95b1cd2.pdfIn PDF document text
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/9601829.pdfIn PDF document text
    • https://mizefubu.weebly.com/uploads/1/3/4/6/134637235/af406.pdfIn PDF document text
    • https://metuzozimo.weebly.com/uploads/1/3/4/5/134589213/7e84b.pdfIn PDF document text
    • https://sizuxemonip.weebly.com/uploads/1/3/4/3/134315948/b5464800b067b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jukozatixul.pbworks.com/w/file/fetch/144714090/33698069429.pdfIn PDF document text
    • http://lokiboz.pbworks.com/f/38348843198.pdfIn PDF document text
    • http://ravowibosu.pbworks.com/f/la_ilaha_anta_subhanaka_inni_kuntu_minaz-zalimin_meaning_in_hindi.pdfIn PDF document text
    • http://pevozowo.pbworks.com/w/file/fetch/144776643/how_to_prepare_acetanilide_from_aniline.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/f/samsung_ecobubble_7.5kg_troubleshooting.pdfIn PDF document text
    • http://sinorodolu.pbworks.com/w/file/fetch/144459930/que_es_dibujo_tecnico_mecanico_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f4b7d1-7621-4a0c-95db-7705661f8e8f/dagupezupurud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88c94d9-cae1-477d-8373-71d471a611b1/business_ethics_and_social_responsibility_notes.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/f/57529700043.pdfIn PDF document text
    • http://gazoridixilu.pbworks.com/w/file/fetch/144509751/19244526912.pdfIn PDF document text
    • http://sukagafamo.pbworks.com/w/file/fetch/144673893/dedem.pdfIn PDF document text
    • http://joriguzo.pbworks.com/f/how_do_you_use_pastebin_scripts_in_roblox_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1f26a9-e37e-4052-8d3a-24463a98e087/ssr_125_racing.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_off0000ff71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF71 5548 bytes
SHA-256: 990ca746653a3334842667093d5527a250e68f1621c9953ae58733bd3431298d
font_01_sfnt_off00011247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11247 11048 bytes
SHA-256: 9263a256d4445885524533205228aeee6cbb56468715ec7b2bd243e24e31ef8b

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