Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddc05e48f37b101…

MALICIOUS

PDF

81.7 KB Created: 2021-03-28 10:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90e095edd81493697a171b4e9a279830 SHA-1: 78a3761e43b0db4a327d3abc977ac6b51d8573a7 SHA-256: 2ddc05e48f37b101da40e55bda6b7c72cc0fb710681f9dacc5de148b565ceeba
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to educational materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://fokemale.ru/wix?keyword=vocabulary+workshop+level+d+unit+4+answers
    • https://cdn-cms.f-static.net/uploads/4394077/normal_60371d0291671.pdf
    • https://cdn.sqhk.co/minofavazu/dNjhD8f/1146872072.pdf
    • https://cdn.sqhk.co/gobejilu/gfPgcgh/phototastic_collage_pc.pdf
    • https://cdn.sqhk.co/natefisaka/gegg2ii/world_of_warships_blitz_mod_apk_ios.pdf
    • https://cdn.sqhk.co/dufimogemeka/cXxijhg/wosutekosaga.pdf
    • https://cdn-cms.f-static.net/uploads/4367964/normal_604159336f65d.pdf
    • https://cdn-cms.f-static.net/uploads/4444647/normal_60224a67e889f.pdf
    • http://tulidefupevewub.iblogger.org/story_of_my_life_by_helen_keller.pdf
    • https://cdn.sqhk.co/litigoruf/fMR4ggF/70690162590.pdf
    • https://cdn-cms.f-static.net/uploads/4393893/normal_6012ec911d773.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kepinud.rf.gd/speech_writing_format_for_class_6.pdf
    • http://delorikafuba.rf.gd/85161850089.pdf
    • https://s3.amazonaws.com/sajatofubote/vufarosi.pdf
    • https://s3.amazonaws.com/xulepiwa/35685939015.pdf
    • http://wudafozejuniv.rf.gd/atif_aslam_mashup_unplugged.pdf
    • http://zezegakaj.rf.gd/was_nerve_a_book_first.pdf
    • http://faloboxodutak.epizy.com/75958114501.pdf
    • https://s3.amazonaws.com/regovadeje/polos.pdf
    • http://balopatesegefa.rf.gd/barista_training_guide_starbucks.pdf
    • https://s3.amazonaws.com/bulujono/mowuvelu.pdf
    • http://fexenisidewa.rf.gd/wojilenidedipetekisejalik.pdf
    • https://s3.amazonaws.com/wexukufedepim/the_school_donald_barthelme_literary_devices.pdf
    • https://s3.amazonaws.com/nawosineromigi/diaries_of_motorcycle_summary.pdf
    • https://s3.amazonaws.com/neporezofov/vadojone.pdf
    • https://s3.amazonaws.com/murudute/tenigujufazazojofeb.pdf
    • https://s3.amazonaws.com/daraniwekamidir/how_to_use_my_mini_egg_cooker.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f441.bin
a5d98a00af336e044fdd900a6684b8035e693e27a962383acd59743ba3c2d8bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF441 5552 bytes
font_01_sfnt_off00010727.bin
1fbe861ae3d6ad0d840c105c2961cab7fa744c2702d584eee2f56526b494548b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10727 10512 bytes
font_02_sfnt_off00012acc.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACC 4324 bytes

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