Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de9986df15afb4c…

MALICIOUS

PDF

86.4 KB Created: 2021-03-09 20:54:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6bfc3df982a25e5c24420d44556c68fa SHA-1: 227d7ff9d7b97598cebfbc3a03e40e2d29a2447f SHA-256: 9de9986df15afb4c5a53ef11123958c51dcb0f184aa49c1c57e4bd9b0c8d1613
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on low-reputation hosting, suggesting a campaign to distribute malicious files or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=anganwadi+online+form+up+2018 PDF link annotation
    • http://sagadutotituvop.22web.org/monkey_iptv_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375528/normal_5fff07e7b3e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484612/normal_600e31df53d10.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/hfGbhfs/lamaxukilin.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/jh2igJF/business_plan_competition_indonesia_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_602a967b29d68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_603c6c3fe31f7.pdfIn PDF document text
    • https://cdn.sqhk.co/rumomezojeku/jeUNLhg/dog_games_for_nintendo_3ds.pdfIn PDF document text
    • https://cdn.sqhk.co/vexerofexe/iiieggE/tamil_nursery_rhymes_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/jb3UTjg/4349453100.pdfIn PDF document text
    • https://cdn.sqhk.co/ledumixifer/I4Vsjhd/sales_strategy_training_program.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5fce1fa2e28d7.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
    • http://fedorahosted.org/lohitIn PDF document text
    • http://bazepuguxadep.rf.gd/accounting_equation_problems_solutions.pdfIn PDF document text
    • http://danobefaxejo.rf.gd/lazak.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/89033883570.pdfIn PDF document text
    • http://nazedizabif.rf.gd/how_to_complete_2500_calories_a_day.pdfIn PDF document text
    • http://jagivaxo.rf.gd/mugebuwemevakitufefarar.pdfIn PDF document text
    • http://fudedeki.rf.gd/63716124325.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/multiplication_facts_worksheets_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/how_to_use_eureka_the_boss_vacuum.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C7 5584 bytes
SHA-256: 46efeb792d2e8fabb1e17e1c1cdddf4079f12a7942d651503b4f8f42e9f02bb8
font_01_sfnt_off0000faba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABA 11308 bytes
SHA-256: 84ca7329990aa6ac6b7e9a048a29900563c6e092541e3f9b6960450ceb36269b
font_02_sfnt_off00012135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12135 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
font_03_sfnt_off00012f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F36 8956 bytes
SHA-256: 41262a7ce2f228dfc19ce645ae5a1b71fc7e4ec17ccdd569f727048042a7337e

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