Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa982477fffc4e7d…

MALICIOUS

PDF

86.0 KB Created: 2021-03-19 10:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1f317abd5b7e10da2a076a9226db45e SHA-1: d8e56da4138c65561cacf2c3d87f017e0fad1018 SHA-256: fa982477fffc4e7dfbace10aa882d208afccc807a309b52cd3b4e5b681459fa4
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The embedded URLs are designed to redirect users to external sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=the+school+for+good+and+evil+pdf
    • http://fesupopimos.66ghz.com/25246487251.pdf
    • https://cdn.sqhk.co/soxuxopova/cSaHEYU/vasamijemafijoxapimus.pdf
    • https://cdn.sqhk.co/mivezifov/iijbhgo/scenario_planning_process.pdf
    • https://cdn-cms.f-static.net/uploads/4418001/normal_60543804dd8a4.pdf
    • https://cdn.sqhk.co/towojutal/eid2heQ/ligotobeduzejiko.pdf
    • https://cdn.sqhk.co/kupovite/jbhaVhK/kim_s_nails_near_me_prices.pdf
    • https://cdn.sqhk.co/pujixefan/Osijyja/rovuzesewunalibevowor.pdf
    • https://cdn.sqhk.co/fotinegataso/iijhgde/bluffton_university_volleyball_division.pdf
    • https://cdn.sqhk.co/zamepeja/gihots2/do_not_touch_baby_deer.pdf
    • https://static.s123-cdn-static.com/uploads/4388626/normal_5ffb43377b78a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://larilelux.epizy.com/55728836654.pdf
    • https://uploads.strikinglycdn.com/files/87e74d55-ac46-4eae-9e4b-10a7061668f9/36993522885.pdf
    • http://kafuzir.epizy.com/think_fast_and_slow_free.pdf
    • http://wazozugafen.epizy.com/modesto_ca_weather_report.pdf
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_b33fe3cedb9a44e786c10d5e4b5e66e8.pdf?index=true
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_17e7b95e6df94c9482095b1949806628.pdf?index=true
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_67bdf06ff5054008ba27ec58ec2e6904.pdf?index=true
    • https://uploads.strikinglycdn.com/files/caed0c49-ef8e-40f6-acce-6676b2517ea7/what_is_the_difference_between_a_chevelle_ss_and_a_malibu.pdf
    • http://kafupeme.rf.gd/winosevijilovototu.pdf
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_e0f7a7d5ca344e2497fd95af99b520ca.pdf?index=true
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_9797fdfacd7b4d6081cb4a6e816cd25f.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011203.bin
6563cbb66270226f6d8bc117cddffd6639f30ba5e1560abb311a57bd2cb41ba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11203 5424 bytes
font_01_sfnt_off0001247d.bin
bdf7519ada11050a8c083ac1530619d57c2cded0cf5df89db1371dc5309e5a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1247D 11388 bytes

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