Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03402ee8126c25d…

MALICIOUS

PDF

76.9 KB Created: 2021-03-01 05:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f1105b027c35cc74892d87434f6fdb25 SHA-1: c2332fa9547a0941b99eb1aeada263a1d444db0d SHA-256: a03402ee8126c25dc2d2322ffcaf12ef65bb3b66bdb095edaf0bc9085efb8e0f
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 or trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains a query that likely serves as a lure to click on one of the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/award?keyword=what+are+the+elements+of+rhythm+and+their+definition PDF link annotation
    • http://lodorobirat.22web.org/nororejefaxixe.pdfIn PDF document text
    • http://barberking.best/76475558399adz0h.pdfIn PDF document text
    • http://sabeladiwuz.22web.org/powerpoint_template_free_2018.pdfIn PDF document text
    • http://bionatur.space/88865239176evf5o.pdfIn PDF document text
    • http://kekomoxigidagug.iblogger.org/86565455833.pdfIn PDF document text
    • http://atomyimperial.ru/70323231435emtdz.pdfIn PDF document text
    • http://limons.space/mastering_the_art_of_french_cooking_recipesu3svd.pdfIn PDF document text
    • http://apeech.ru/trading_for_dummies_audiobook5r3s4.pdfIn PDF document text
    • http://meetporte.xyz/40396474951lic0h.pdfIn PDF document text
    • http://rabejagoruwobol.66ghz.com/us_air_force_uniforms_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifinuneniw.rf.gd/how_to_prepare_for_manual_dexterity_test.pdfIn PDF document text
    • http://minirulo.epizy.com/elazko_philips_azur_performer_calc_clean.pdfIn PDF document text
    • http://tifoxirekurox.epizy.com/pokemon_art_style_guide.pdfIn PDF document text
    • http://kazoverowagodi.epizy.com/auckland_international_airport_flight_information.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/navy_advancement_exam_dates_2021.pdfIn PDF document text
    • http://jirufemen.epizy.com/powerwise_charger_not_charging.pdfIn PDF document text
    • http://tuvatopuvonu.epizy.com/hungry_shark_world_pc_apk.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_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 5260 bytes
SHA-256: adf2bb1b192ad634ae60c23246a8da6ca6d5c68680a04754015f2b69405c6629
font_01_sfnt_off000102f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F9 10308 bytes
SHA-256: 678f917baadee4e7f2ffcf9a8de8a7e14b6bb0ce10cb639bf8d022fa3ded29c6

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