Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4d10241d42a8a7…

MALICIOUS

PDF

77.1 KB Created: 2021-01-23 14:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 436bccf4f27adbfaf7107d02a5db9397 SHA-1: e7f689c1a62590486bbac9fa6c4c939719eab5e4 SHA-256: 3f4d10241d42a8a779845de75e2d154ac66c1d6b1fd6a0c4ea9a3cca8c06e184
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'ADHD treatment guidelines'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/aws?utm_term=adhd+treatment+guidelines+canada
    • https://static.s123-cdn-static.com/uploads/4451970/normal_5ff0ea6e617ba.pdf
    • https://static.s123-cdn-static.com/uploads/4383918/normal_6008eb324075c.pdf
    • https://site-1247964.mozfiles.com/files/1247964/ratotekibin.pdf
    • https://static.s123-cdn-static.com/uploads/4450721/normal_60080b2211ed4.pdf
    • https://site-1173352.mozfiles.com/files/1173352/palusizibofodenomet.pdf
    • https://cdn.sqhk.co/vadetegubufo/ZijhcyO/kanto_pokemon_shiny_list.pdf
    • https://cdn.sqhk.co/vabedesi/RjfiiB6/download_stickman_the_flash_mod_apk_android_1.pdf
    • https://cdn.sqhk.co/geroterunetu/YhgjcUJ/snake_iii_games_apk.pdf
    • https://cdn.sqhk.co/tinupolureg/tidFKij/new_song_2020_ringtone_download_bestwap_pagalworld.pdf
    • https://static.s123-cdn-static.com/uploads/4498997/normal_5ff64ec39ff98.pdf
    • https://cdn-cms.f-static.net/uploads/4476421/normal_5fd72ec20020f.pdf
    • https://cdn.sqhk.co/getabemuto/jiem6dA/leather_horse_armor_minecraft_pe_recipe.pdf
    • https://cdn.sqhk.co/bobavijiwoba/fEidnic/93886183779.pdf
    • https://cdn.sqhk.co/fedelubu/VsEwNdK/piano_lessons_for_autistic_child_near_me.pdf
    • https://cdn.sqhk.co/kegufamop/hjjb7WL/my_walmart_schedule_app_canada_iphone.pdf
    • https://cdn.sqhk.co/salenasova/hggFJhg/pin_code_of_kasak_circle_bharuch.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tuxexi/mcdonalds_questionnaire_answers_2016.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_off0000f29a.bin
9031f7f91fce184a4272f0eda86915e07ad30f6898af8117b71919462a5f0fd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF29A 5340 bytes
font_01_sfnt_off00010499.bin
00f11be340698a3c661fe8502388ee43bc7e7d22f0957d8a085aa8956430e620
pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 10196 bytes