Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b0f1bb69d7fefb…

MALICIOUS

PDF

76.1 KB Created: 2021-04-24 12:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c79fc9c6f3052ac600c91bde86de693c SHA-1: 246316f32b2b320dff68b91b991bfeb01ff45cd1 SHA-256: 65b0f1bb69d7fefb6812bcd0499156f63ed270495df7b4b040210571e919ff79
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to a search query, designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=how+much+does+a+55+inch+sony+tv+weigh PDF link annotation
    • https://fibunijir.weebly.com/uploads/1/3/0/7/130740490/7cacf7ff342999.pdfIn PDF document text
    • http://kmplitka.shop/1037302737s6qp1.pdfIn PDF document text
    • http://lunesygets.xyz/noticias_telemundo_47_hoywv5xg.pdfIn PDF document text
    • https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/netusexo-zorexepizasagon-xaxabuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423442/normal_5fcb191928621.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475864/normal_5fca2ee44b225.pdfIn PDF document text
    • http://lagulesuko.medianewsonline.com/abbyy_transformer_download_free_3._0.pdfIn PDF document text
    • http://cafe-cok.ru/64469793704i2jri.pdfIn PDF document text
    • http://porabobamefomuk.22web.org/governor_of_poker_2_mod_apk.pdfIn PDF document text
    • http://lozomaneje.getenjoyment.net/98164659950.pdfIn PDF document text
    • http://miraluvofizobe.medianewsonline.com/zazoxujurinikofopegitisun.pdfIn PDF document text
    • http://lirebuwoke.mygamesonline.org/wubogekagoruk.pdfIn PDF document text
    • https://fevowavekotaxuw.weebly.com/uploads/1/3/4/6/134635114/kojafuwawerufewafoju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://teredibake.rf.gd/cv_format_for_job_application_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b20000-46b1-415c-a023-2e7415efc8dd/refob.pdfIn PDF document text
    • http://wawuzir.epizy.com/58129104142.pdfIn PDF document text
    • http://vowoxemaxevajo.epizy.com/sirumimevezudefidutaxupev.pdfIn PDF document text
    • http://lefabeku.epizy.com/burewabavevifakajonebewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b74489-42e3-46ad-951e-eb198dce4d4f/dyson_dc44_animal_battery.pdfIn PDF document text
    • http://lipabarud.atwebpages.com/jisugadodoruruvanebelubus.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_off0000ea10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA10 5564 bytes
SHA-256: 5c0587921b163dce75b7701b5e91487182c8a9dfdceffd5242b6610ae847b0e3
font_01_sfnt_off0000fcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF6 11148 bytes
SHA-256: 20d031f8ad16931394d1834d04409ff73036e5a45e2e82f31051e6462ea4514e

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