Malicious PDF — malware analysis report

Static analysis result for SHA-256 690e000bedd384c8…

MALICIOUS

PDF

79.8 KB Created: 2021-09-18 23:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4c1af18a9e35973291f2dd946d6afa58 SHA-1: d384a35eab59d978d70d71b095730e9db214dc56 SHA-256: 690e000bedd384c81184dd74ff86b96709d7ff4597c97da6aa9baec6d1c158fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs that point to a link farm, suggesting a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high volume of links to potentially untrusted domains, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://devitohomesorlando.com/userfiles/files/lapipamimajoku.pdf In PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/5552177208.pdfIn PDF document text
    • http://bidadapatidar.com/userfiles/file/rumomifofamemitadefuzi.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/59301108316.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/88876278142.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/46988259187.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/gunofimopizedelo.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/zamajasisukumitutid.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/bedojexo.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/xivupax.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/19738696002.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/51992146207.pdfIn PDF document text
    • http://vhshf.de/File/145744981.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/e8de1f81d56f661cac9f52ca6c6d3310/239926689.pdfIn PDF document text
    • http://marymo.ru/uploads/files/92324348801.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/rerozigoranuzodejulif.pdfIn PDF document text
    • https://ikima.fr/uploads/file/xijokax.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/50814f4543074526df65bad4b35b63f4/42760554226.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/jademolowurozopufaw.pdfIn PDF document text
    • http://denetimmusavirlik.com/userfiles/file/bogesefawixizaf.pdfIn PDF document text
    • https://irantruck.ir/data/file/28324449023.pdfIn PDF document text
    • https://emartdeko.pl/galeria/file/rezokanono.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/98900274568.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=amazing+spider+man+2+android+game+downloadPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE259 10884 bytes
SHA-256: 709c10a72f48d3bb8df1c3f4df107fc2adbf5508e42e85910f387936ac67d2dd
font_02_sfnt_off0000fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 20920 bytes
SHA-256: 3537a634528931b42aa26002b0af22c3202db46b1a070127a8963261ee1f141d

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