Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0f387cf16e270d…

MALICIOUS

PDF

75.8 KB Created: 2021-03-25 13:19:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 04811e5361563cc482fe78b680c29207 SHA-1: 6373e92164b003339608fa48c4ed3dc97f8b65d0 SHA-256: 1f0f387cf16e270dd304d9eda24dbe5070b1a473fc8495b4a02b08686b796677
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, many pointing to disposable domains, suggesting a link farm or phishing infrastructure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is designed to host many links on disposable hosting, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=pdf+file+sample+resume PDF link annotation
    • http://roxelejabojafe.scienceontheweb.net/casio_outgear_sgw-100-2b_twin_sensor.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/cjcPggj/7247552560.pdfIn PDF document text
    • https://dinomorozowi.weebly.com/uploads/1/3/4/6/134610364/nawutotoribix-jinexewijaxozo-ruwabusa.pdfIn PDF document text
    • https://cdn.sqhk.co/dugudumopup/jbgdgjN/83444547163.pdfIn PDF document text
    • http://loxebosobudi.66ghz.com/caloocan_science_high_school_uniform.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/jegitex.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdfIn PDF document text
    • https://mukekevujawova.weebly.com/uploads/1/3/0/9/130969498/8291330.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/46335103749.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/dmv_how_to_renew_my_license.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuzadakeju.epizy.com/divabujobafodeboxubi.pdfIn PDF document text
    • http://xegiseko.epizy.com/types_of_cannula_and_their_uses.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/lilosefugujunoluzeb.pdfIn PDF document text
    • http://nuxidewoti.epizy.com/faregafisonopave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/326923ee-84e3-49cc-8e4c-fb1bcc88dd8b/the_critical_drinker_wikipedia.pdfIn PDF document text
    • http://rufuvavigesu.epizy.com/catalogo_dupree_campaa_6_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b86a4c-29f3-4a63-a7b5-102cffc4afd2/swisher_vs_dr_brush_mower_reviews.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_off0000df86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF86 2900 bytes
SHA-256: 884cbfdeb878ee20e2c146b05a1641383b41b88cd86c369d761b3a8bde37f1a2
font_01_sfnt_off0000e9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DD 5188 bytes
SHA-256: 36a8fd6df4a7ffda516590e6edc1dbc033aa9daa282de9f7625bdd2fb830f223
font_02_sfnt_off0000fb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB72 11348 bytes
SHA-256: f74db897421d7701b7608c34687a381c80ce9b3f94efd218ecf872ed2b124166

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