Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c340571802b6a6…

MALICIOUS

PDF

81.6 KB Created: 2021-03-06 15:28:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d8ba9127588642aa8bacc0f42a439be SHA-1: 763dd2400056a71070b4ed46ac1007885bcea058 SHA-256: 67c340571802b6a6a7957683fa8a6286a08529f8b4fc209ef872c640ec55349d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'ccna routing and switching study guide pdf 2018'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=ccna+routing+and+switching+study+guide+pdf+2018
    • http://wapadax.scienceontheweb.net/how_much_water_does_a_speed_queen_front_load_washer_use.pdf
    • https://cdn-cms.f-static.net/uploads/4411926/normal_6028166ec0a29.pdf
    • http://naturwows.space/where_is_thermal_fuse_on_kenmore_gas_dryerleish.pdf
    • https://cdn-cms.f-static.net/uploads/4409394/normal_600e7d2e7451e.pdf
    • https://cdn-cms.f-static.net/uploads/4493916/normal_603923279af4b.pdf
    • http://miwewumexurigan.sportsontheweb.net/jolafutilosazodarasas.pdf
    • https://static.s123-cdn-static.com/uploads/4427287/normal_5ffd2f70f1426.pdf
    • http://naturaleone.space/tusozewepvd760.pdf
    • http://ylyn.ru/scorpion_animal_wallpaper_4klsj4j.pdf
    • https://static.s123-cdn-static.com/uploads/4473035/normal_5ff64db7a1fbb.pdf
    • http://lapitubemexidi.mywebcommunity.org/how_to_make_toga_himiko_in_gacha_life.pdf
    • https://cdn-cms.f-static.net/uploads/4485305/normal_601543f0ec289.pdf
    • https://cdn-cms.f-static.net/uploads/4478148/normal_603f7b6087bf7.pdf
    • https://static.s123-cdn-static.com/uploads/4486535/normal_5ff76588e5b46.pdf
    • http://clobuss.ru/36241436027jpcyz.pdf
    • https://static.s123-cdn-static.com/uploads/4369796/normal_60009a676762b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fatikonavori/81260046247.pdf
    • https://s3.amazonaws.com/wujapu/chrome_addons_for_android.pdf
    • https://s3.amazonaws.com/lixisariwulo/how_to_reset_kenmore_elite_dishwasher.pdf
    • https://s3.amazonaws.com/tugumeb/13962150594.pdf
    • https://s3.amazonaws.com/mexijegedakol/free_music_ringtones_for_my_phone.pdf
    • http://korofituzuxigu.onlinewebshop.net/fanekavetulatakebof.pdf
    • https://s3.amazonaws.com/legesiliv/bawapowobamizuzukesona.pdf
    • http://mijovutotukedes.onlinewebshop.net/58754441947.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4d7.bin
e0d75129547947cc37b1950f652fb1ba2c426818eda2d1e1afae30a7dc7f9095		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D7 6004 bytes
font_01_sfnt_off0001095d.bin
8a17500a25157e3d0bbf4223a4c81d4ff20a3f19e0418d55427c70bce763350b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 15136 bytes

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