Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f8c72966b7e146…

MALICIOUS

PDF

71.6 KB Created: 2021-02-27 11:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78029439c369cab89ad3511b2bce88ee SHA-1: 90b3acd7904b29b9b5a4ad8bcf8e9e65cf87686b SHA-256: 99f8c72966b7e146f61b8f39f4b77c423fe0d989e89f90d38c6324d391aa9986
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host phishing content or a further payload. The document body, though heavily obfuscated, suggests a lure related to a 'webquest answer key', aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=blood+spatter+webquest+answer+key
    • http://lunatan.medianewsonline.com/which_pokemon_game_is_the_best_for_ds.pdf
    • https://cdn.sqhk.co/polidupokasu/ighie2B/gezuregakogixad.pdf
    • http://xorabawik.medianewsonline.com/wamivuvezabozikikan.pdf
    • http://tevutubiwij.getenjoyment.net/gejodaxel.pdf
    • http://tiktokcopyrighthelpteam.com/handwritten_receipt_template_wordgfhvo.pdf
    • http://falorilipeb.mywebcommunity.org/new_york_dma.pdf
    • http://zogometemo.sportsontheweb.net/99568293308.pdf
    • http://tibagisuminove.sportsontheweb.net/how_to_shift_realities_while_awake.pdf
    • http://wowitaly.space/imaginarium_metro_line_train_table_assembly_instructionsjsc0i.pdf
    • http://gexopidikimo.mygamesonline.org/2002_lexus_es300_battery_change.pdf
    • https://cdn.sqhk.co/naziwixolagu/fYi6o9l/lost_sphear_gameplay_espanol.pdf
    • http://sijemogezabusa.sportsontheweb.net/kinetico_water_softener_service_near_me.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vorisenunajix.myartsonline.com/lord_of_the_flies_important_quotes_chapter_1-3.pdf
    • https://s3.amazonaws.com/gajabedafot/platformio._ini_add_library.pdf
    • https://s3.amazonaws.com/wufujudisu/97767861522.pdf
    • http://sogivuwe.onlinewebshop.net/optiplex_7010_driver_pack_windows_7.pdf
    • https://s3.amazonaws.com/tabobujimo/1757820235.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_off0000c5a6.bin
b94aded20cc19f358c4c413f38b41f9cbc22e4c58cac659cb846a59d6731e20c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A6 5524 bytes
font_01_sfnt_off0000d89c.bin
5281db93fdd0daf2f52192b2f36000edf4e0c3d8185cd0bb51b4e0cebd02e1d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD89C 10148 bytes
font_02_sfnt_off0000fb8c.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 16092 bytes