Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c1f3c5c9484086…

MALICIOUS

PDF

72.8 KB Created: 2021-01-11 12:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 72a365660461cdcab2dbc3d0eae7d62f SHA-1: a85e6ed9b1c8a2a8f9e310079bb474ae67201bae SHA-256: e4c1f3c5c948408604ca19d6c5d47e39cc570ae7c50ebeed241fe5c457fba377
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains an external URI pointing to a suspicious domain, and a remote support tool lure is present in the document's content, instructing the user to install such tools. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to trick the user into executing a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=vce+player+latest+version+free PDF link annotation
    • https://site-1166600.mozfiles.com/files/1166600/idle_stickman_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416332/normal_5fb554f1aa314.pdfIn PDF document text
    • https://site-1171149.mozfiles.com/files/1171149/95472904113.pdfIn PDF document text
    • https://site-1179105.mozfiles.com/files/1179105/83927514843.pdfIn PDF document text
    • https://site-1240273.mozfiles.com/files/1240273/alien_shooter_game_for_android_mobile.pdfIn PDF document text
    • https://site-1166652.mozfiles.com/files/1166652/tropico_6_ps4_dlc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5fcb7404a87cd.pdfIn PDF document text
    • https://site-1188796.mozfiles.com/files/1188796/xibeduxoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f8fe39648b41.pdfIn PDF document text
    • https://site-1174507.mozfiles.com/files/1174507/biblia_para_nios_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368474/normal_5fc0cbec1b6cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467273/normal_5fb8a9346af39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5fa0e510a4869.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/17990785660.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/phenolic_compounds_book.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/uttarakhand_high_court_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/79979138304.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 5136 bytes
SHA-256: 2cc3f499b0ea3a76d70ce1733045f91d8f0b34eb8db2871fde9da0cdf8e6adef
font_01_sfnt_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 10488 bytes
SHA-256: f6539cbccc943fc8eb712b6fd378ad2c9fad8d3af3a3e4c0687f66c9cc45570a

Open this report in the interactive analyzer, or submit your own file for analysis.