Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d4d952e11fb888…

MALICIOUS

PDF

80.0 KB Created: 2021-03-11 10:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0a4d6b252ea118be188cbe52d1ac4e24 SHA-1: 047ee0659366ff4a48f9859b51c74d9789fb253c SHA-256: a8d4d952e11fb888386568d654ff6ae7ff77f5f60aea7b478e49ea07c5bac8c4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a link farm on disposable hosting, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=antioxidantes+endogenos+pdf PDF link annotation
    • https://cdn.sqhk.co/ranetixeba/hhhcJhe/favavaxurajevolokulonogeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366343/normal_5fe01b06ede82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392873/normal_5fccf559d89e7.pdfIn PDF document text
    • https://nuwofukejixi.weebly.com/uploads/1/3/1/4/131437867/0576b5a81d.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/jh52tgh/likumemebidewevoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485711/normal_6041f324e5021.pdfIn PDF document text
    • https://jaxipalat.weebly.com/uploads/1/3/4/7/134746428/8011613.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/gcgcv1K/sticky_block_css.pdfIn PDF document text
    • https://bokasaveti.weebly.com/uploads/1/3/4/7/134725866/8b12dbddd5c.pdfIn PDF document text
    • http://nexekuwa.22web.org/sibabigidasowate.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/7617327.pdfIn PDF document text
    • http://wuxakex.iblogger.org/maxi_cosi_pria_70_seat_cover.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gofosuxubajo.epizy.com/fomixamedokumabib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f69cfa-40aa-4de9-8ffe-8d5c3354c30f/83206570386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f44cc6-b5e9-4867-ad14-573cbd606c44/82223173358.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/honeywell_thermostat_manual_rth221b1039.pdfIn PDF document text
    • http://fukogalijikufoz.epizy.com/rc_flight_sim_xbox_360.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/importance_of_balance_sheet_in_financial_forecasting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44df2599-90c7-4722-a3da-72ee56fb3695/nike_air_force_1_shadow_white_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc14afd-3b99-4bde-9752-952a9a5c3853/how_to_fix_maytag_centennial_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce60a20-1a10-469d-a19a-2170afa547c5/75613318917.pdfIn PDF document text
    • http://nawulariwataxut.rf.gd/auguries_of_innocence_analysis.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_off0000fc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5E 5136 bytes
SHA-256: 409a62449ac1d4eefa387f3b4764e83c1f9040498d7a316a75f60d5110e00fb4
font_01_sfnt_off00010dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFA 11172 bytes
SHA-256: 6abb9228045f53256f59c80d01868807787f1f74018a3ffe2c240a93d2849ede

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