Malicious PDF — malware analysis report

Static analysis result for SHA-256 8018bdfcd4fa80ba…

MALICIOUS

PDF

78.6 KB Created: 2021-03-14 04:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28f230e9f7cd52137598189d5d02badc SHA-1: e9d81f3206e3bfdecf42b9755ce4461dd5800ac5 SHA-256: 8018bdfcd4fa80ba0e0f7ed49ea2015c1722fe3630b0da48fa0450b8ff6493ac
104 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to host or deliver a secondary payload. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=customs+declaration+us+form+pdf
    • https://cdn.sqhk.co/nogegamapagi/cddqhgg/xuxad.pdf
    • http://xijulefabogi.getenjoyment.net/gokagejitezenitebu.pdf
    • https://cdn.sqhk.co/woleparos/j5t9jiH/50688973852.pdf
    • https://cdn.sqhk.co/lepavenujal/tHVD0gf/smith_s_weekly_ad_lake_havasu_city.pdf
    • http://dobogoj.iblogger.org/is_super_smash_bros_on_nintendo_switch_two_player.pdf
    • https://cdn.sqhk.co/fomanazoravu/Ijbjifx/16067365557.pdf
    • https://cdn.sqhk.co/xenaporo/3vifnq4/street_dunk_mod_apk_android_1.pdf
    • http://prizinsta365.online/boxolalivoyu8m3.pdf
    • https://cdn.sqhk.co/merabuvi/jigeuV8/punjabi_mashup_song_2019_download_pagalworld.pdf
    • http://cetakchantek.com/how_much_does_an_interior_designer_make_in_usa3f6y4.pdf
    • http://kunepuvobimamin.medianewsonline.com/caterpillar_gas_generators_catalogue.pdf
    • https://cdn.sqhk.co/fowijuseziju/3yhhAhj/zazel.pdf
    • http://efarbok.xyz/prime_factorization_worksheetfd0o8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pezageroxo.rf.gd/rslogix_5000_emulator_install.pdf
    • https://s3.amazonaws.com/ladiwuzetawedi/gudubowuweverupedutu.pdf
    • http://saboveliga.myartsonline.com/how_many_chapters_are_in_harry_potter_book_1.pdf
    • http://woxutonugosafer.epizy.com/opposite_meaning_of_the_word_loneliness.pdf
    • https://s3.amazonaws.com/risalenefazozo/breaking_dawn_3_movie_in_tamil.pdf
    • http://nazonuretowu.epizy.com/ximinarekaregimune.pdf
    • https://s3.amazonaws.com/fowikorejodi/infantile_spasms_treatment_guidelines.pdf
    • https://s3.amazonaws.com/neviwove/studio_of_dance_and_performing_arts_newtown.pdf
    • http://todidetiped.onlinewebshop.net/biographical_recount_text_structure.pdf
    • http://jimarol.myartsonline.com/nonunukadol.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_off0000f442.bin
89743de3c42493d49f61d1cf9990123934a7c53158b7bfd60e6b4f736e0205bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF442 5208 bytes
font_01_sfnt_off000105dc.bin
b70289a122fc32225d6804cb3f66b7d0682e9dc9325612d8beadca393f5c2b68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105DC 10996 bytes

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