Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead6a36f8d360da8…

MALICIOUS

PDF

175.7 KB Created: 2021-03-23 13:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: dc083598595b5ffd5b0e082684823100 SHA-1: 8417ff09b8d0131e2ddca3edecec0ddf81a3c32a SHA-256: ead6a36f8d360da8b2c73e568449f782b29790b0e0d25da9e9aa5f115f501c63
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'seumenha.ru' which is associated with a keyword search, suggesting a lure. The PDF structure and embedded content indicate it's designed to redirect users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://seumenha.ru/wix?keyword=ffxi+blue+mage+aoe+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451757/normal_600102d2bdd2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451019/normal_5fc75002cfdda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416802/normal_600c4973e230b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451551/normal_602ef2a61f271.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/puviwaximaxeduw.pdfIn PDF document text
    • http://kufomabid.mywebcommunity.org/31197136212.pdfIn PDF document text
    • http://pojibuvuj.mygamesonline.org/orange_county_school_calendar_2020_18.pdfIn PDF document text
    • http://duxinivodozular.mywebcommunity.org/how_to_calculate_p_value_from_f_statistic_by_hand.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_605120e1178a7.pdfIn PDF document text
    • http://kulokozataxat.22web.org/pandorum_english_subtitles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422371/normal_60514e2ec7345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4859805/normal_6035138d619e6.pdfIn PDF document text
    • http://suwadebizon.mywebcommunity.org/purified_water_specification.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427105/normal_5ff3358a22f7b.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/retivupefuzujeke.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://lozunina.epizy.com/how_to_turn_on_vizio_tv_without_remote_or_power_button.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/muqabla_bohemia_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/meyer_e47_pump_parts.pdfIn PDF document text
    • http://gulizut.epizy.com/xamutebililesuxej.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/wukozizomibubuwonebuxoval.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/how_to_get_six_sigma_black_belt_certified.pdfIn PDF document text
    • http://dimegebewode.epizy.com/nimujedadataruzil.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/susifimini.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_off00026a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26A47 4812 bytes
SHA-256: 781a18eaa48a40865ebb4f8873fd5e0992e9232ac7c713a3b4d5e9baebe5c953
font_01_sfnt_off00027aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27AAA 11628 bytes
SHA-256: 889dad8e21327f2862f0bede9aca8fe2842a8c8c666b9d39eada01c236142c50
font_02_sfnt_off0002a27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A27B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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