Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e184050eeb28ec…

MALICIOUS

PDF

100.1 KB Created: 2021-01-21 02:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11262c64cb82df7f489910290924ccce SHA-1: 70c2efbba027bfc7bfc5bd68186af2d580a6ca44 SHA-256: 57e184050eeb28ec4dd64810012eceb09944e3eebc271682decafa5f9c5cedf1
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading further malware or providing sensitive information. The PDF structure and embedded content suggest it is delivered as a spearphishing attachment.

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://crophysi.ru/123?utm_term=risk+management+worksheet+pdf
    • https://static.s123-cdn-static.com/uploads/4384307/normal_5fcf294eb9629.pdf
    • https://site-1192097.mozfiles.com/files/1192097/zapinajidekutosu.pdf
    • https://site-1177226.mozfiles.com/files/1177226/paralyzed_veterans_of_america_near_me.pdf
    • https://site-1176043.mozfiles.com/files/1176043/disgaea_5_class_mastery_guide.pdf
    • https://static.s123-cdn-static.com/uploads/4407552/normal_5fe4ab0fcbeed.pdf
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fcdf11586e92.pdf
    • https://site-1218543.mozfiles.com/files/1218543/scream_jump_game.pdf
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5fa7c81a9d872.pdf
    • https://site-1178471.mozfiles.com/files/1178471/die_in_100_ways_online.pdf
    • https://site-1244830.mozfiles.com/files/1244830/75409383435.pdf
    • https://site-1187467.mozfiles.com/files/1187467/kilajulifejalad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/remeranexe/autodesk_maya_2018_manual.pdf
    • https://s3.amazonaws.com/levumoduf/34254737469.pdf
    • https://s3.amazonaws.com/remeranexe/countdown_clock_after_effects_template.pdf
    • https://s3.amazonaws.com/rewepalazamiso/30025350763.pdf
    • https://s3.amazonaws.com/gorajikunobixi/cisco_routing_and_switching_200-_125.pdf
    • https://s3.amazonaws.com/xazarujokemus/commercial_cleaning_proposal_template.pdf
    • https://s3.amazonaws.com/tarizirefevifab/iron_deficiency_anemia_treatment_guidelines_2018.pdf
    • https://s3.amazonaws.com/jeponowon/sample_of_informative_speech_about_myself.pdf
    • https://s3.amazonaws.com/jadere/22204500811.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_off00014ab8.bin
ee56f018af762fbc18ba846e19aa51fcbd6a68d936eebd89006c6c2a0745c035
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB8 5584 bytes
font_01_sfnt_off00015da4.bin
31de3e0de163e318bc389df9f2ef29acdb8f81648cfbed84d6789dbef3874337
pdf-font-stream PDF embedded font (sfnt) at offset 0x15DA4 11044 bytes