Malicious PDF — malware analysis report

Static analysis result for SHA-256 361736ba79bcae3f…

MALICIOUS

PDF

97.8 KB Created: 2021-03-25 09:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0de5bf06b5a2c3324f5a0f6a4abeab29 SHA-1: 5a0d8644eb174235874b7c9a3d81aa0b736cf1be SHA-256: 361736ba79bcae3f41ece2010001808f0fb3dcbf083771ed31656c64b58113c9
96 Risk Score

Malware Insights

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

The file is detected as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to learning German.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=aprender+aleman+desde+cero+pdf
    • https://cdn.sqhk.co/lesasafo/aheZhdv/influencer_marketing_strategy_presentation.pdf
    • https://cdn.sqhk.co/godezixibufo/Wibheue/diamond_brokers_of_memphis_instagram.pdf
    • https://cdn.sqhk.co/risinibigasi/gQDxhTp/download_supreme_duelist_stickman_pc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gumegulaxi/alesis_dm5_pro_manual.pdf
    • https://s3.amazonaws.com/xoferuzu/d._c._college_hajipur_2018_results.pdf
    • https://s3.amazonaws.com/zakunafu/virgin_australia_movie_app.pdf
    • https://s3.amazonaws.com/guvovigo/41279742889.pdf
    • https://uploads.strikinglycdn.com/files/52752c5f-d3c6-46cf-a66f-929793529ff2/life_fitness_bike_screen_not_working.pdf
    • https://s3.amazonaws.com/bakoloj/puros.pdf
    • https://uploads.strikinglycdn.com/files/89182315-1aae-488a-8f0f-2f28a227d061/38135358203.pdf
    • https://s3.amazonaws.com/zobuwubedak/42177824080.pdf
    • https://s3.amazonaws.com/kabisebax/jeevan_akshay_vi_form.pdf
    • https://uploads.strikinglycdn.com/files/11ab6164-6376-41b6-8e3b-cdb65c36dd0d/23677994560.pdf
    • https://s3.amazonaws.com/jenisozazewubo/58580439852.pdf
    • https://s3.amazonaws.com/sagotomagin/99506850999.pdf
    • https://s3.amazonaws.com/jefobexapulow/cyborgs_heroes_never_die.pdf
    • https://s3.amazonaws.com/wuzalugiseto/bubble_mania_games_free.pdf
    • https://s3.amazonaws.com/moduxanakuri/bhanga_hrudaya_odia_song_mp4.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012710.bin
64dc99e601f9585b0d67a1b0dfcb1170a5809cf179b25050c8401adabcb785b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12710 5288 bytes
font_01_sfnt_off000138f8.bin
7b1dd971d1f5b534daa377a0bd7ff681adaa2e92ca71a77f09d5b70cd61e9e9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x138F8 13024 bytes
font_02_sfnt_off000162bd.bin
b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x162BD 16312 bytes