Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcecea0d0a5804c9…

MALICIOUS

PDF

77.4 KB Created: 2021-03-19 04:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b7532cb8969fd7a454c19a968d8b3905 SHA-1: 1ac78823642a7d9d0b02b879b99d02b3bdce0a6b SHA-256: fcecea0d0a5804c9de8f4d95a72dcf1a497b60c269af788b6d9de565b33eb655
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 or link farms, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/award?keyword=anova+one+way+and+two+way+pdf PDF link annotation
    • http://gamukanemafutu.mywebcommunity.org/business_communication_today_courtland.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafepel/2JppWZF/xowisosofivuxilebar.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/c8lidic/bmat_section_2_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/fSfijia/baby_boy_growth_chart_calculator_canada.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/illinois_prevailing_wage_rates_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496584/normal_5feff06e1d61a.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/hbgjjar/19634649033.pdfIn PDF document text
    • https://cdn.sqhk.co/serutaja/TgcQhaG/ludanujeku.pdfIn PDF document text
    • https://cdn.sqhk.co/nigudovowa/jt43gI5/naruvekiredo.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/ven_ven_senor_no_tardes_letra_y_acordes.pdfIn PDF document text
    • http://zexitekaxob.mypressonline.com/op_amp_ic_741_datasheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415334/normal_5fcedb2292e73.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/atheist_guide_to_reality.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/fggN3qI/sewanafiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417030/normal_600534a3bb5b5.pdfIn PDF document text
    • https://cdn.sqhk.co/wekonexiw/oJhdjd4/home_electrical_wiring_simulation_software.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391037/normal_5fef8db52506f.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
    • https://uploads.strikinglycdn.com/files/d27f5776-e4f4-4a7a-8991-678747ae60ff/64349256643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e21a10cf-0739-4363-ac64-2756619f668c/husqvarna_zero_turn_riding_lawn_mower_reviews.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/vililulefegazib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c299d22-2b39-414d-a51c-98ade21e3ec6/the_little_soul_and_the_sun_amazon.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_off0000e576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE576 4712 bytes
SHA-256: e32e654ab140191033d5bd49362e2f86dfe342b111eef5465a32212960090621
font_01_sfnt_off0000f5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 10668 bytes
SHA-256: 331efb4e8ede69c436d416f86ab04b1344d850bc97c86da931b7b1e0adcb2057
font_02_sfnt_off00011a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A28 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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