Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9bdc940b4419c12…

MALICIOUS

PDF

72.0 KB Created: 2021-02-27 16:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9c8f73ff0ae10f25a573ad3a79b87eee SHA-1: b8b6cf85df8b843236dbd609b4e9b03385c6078c SHA-256: e9bdc940b4419c12a21f289dc51987bbab471f2b781280eda89905f42ebf95a7
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a URL that offers a download for 'frontline commando 2 mod apk unlimited gold download', suggesting a lure for users seeking game cheats or mods. The PDF also functions as a link farm, with numerous links to disposable hosting, further reinforcing its malicious intent.

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://jacksth.ru/wix?keyword=frontline+commando+2+mod+apk+unlimited+gold+download PDF link annotation
    • https://wuwikofoxanep.weebly.com/uploads/1/3/1/4/131437976/4813b8f3b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450732/normal_6000cc84da656.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/zZ5hdjh/85708561492.pdfIn PDF document text
    • http://rulogojaratimad.22web.org/air_bearing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454825/normal_60087f9058535.pdfIn PDF document text
    • http://mevuzomoxoximef.22web.org/kenmore_oven_parts_knob.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/9PhdCHu/namivubi.pdfIn PDF document text
    • https://cdn.sqhk.co/texirova/eOhibgc/las_vegas_softball_tournament_february_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/bhiaXH9/meteor_shower_animal_crossing_dates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovanesoku.epizy.com/midesowedovujoritexak.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/alkaline_earth_metals_easily_form_cations.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/ruxesosuzadofoz.pdfIn PDF document text
    • http://mevumum.epizy.com/hand_of_fate_2_justice_gold_guide.pdfIn PDF document text
    • http://vedisupekak.epizy.com/netbeans_tutorial_2020.pdfIn PDF document text
    • http://parorusoba.rf.gd/what_is_the_elaboration_likelihood_model_of_persuasion.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/rosusedevozazitozibolugem.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/26057059467.pdfIn PDF document text
    • http://muloluj.rf.gd/types_of_oil_burners.pdfIn PDF document text
    • http://pibonev.rf.gd/hero_wars_titan_leveling_guide.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_off0000dd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1F 5456 bytes
SHA-256: a5aa63b443c00802788f6ee76e7c847b2c9713c359ffbe3fa83f68d26fe836fe
font_01_sfnt_off0000efb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB0 10148 bytes
SHA-256: 74c0897d0fb083358d98e7f3b9209183f4287cbed96436d939aaa2d4b82294df

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