Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c66d9ab8e3d09fe…

MALICIOUS

PDF

85.5 KB Created: 2021-04-16 17:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23612264045a68e5bca5c24a6614f4f6 SHA-1: 4f672c30e1ca588d7dde06ec18b9f1ceee750dfd SHA-256: 2c66d9ab8e3d09fe68013dcfe9acb6906fd5d61f4f7b5636c8892e8163aaa24b
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'dafemum.ru', which is likely used to host malicious content or redirect the user. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through a phishing lure, likely initiating a download or redirect.

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://dafemum.ru/strik?utm_term=why+does+zeus+gave+pandora+the+box
    • http://xejapuz.getenjoyment.net/asphalt_drum_mix_plant.pdf
    • http://dufigep.scienceontheweb.net/23807661177.pdf
    • https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/2986877.pdf
    • http://gojodefigogizib.iblogger.org/network_diagram_download.pdf
    • https://mubujibazakob.weebly.com/uploads/1/3/3/9/133986275/04d4b44316f.pdf
    • http://tuwavetatifida.iblogger.org/barron_essential_words_for_the_toeic.pdf
    • https://vuxabodunufa.weebly.com/uploads/1/3/1/4/131407539/gogajamakuxi.pdf
    • http://fesufobototezer.mywebcommunity.org/63566506085.pdf
    • https://faturigazed.weebly.com/uploads/1/3/4/8/134859690/2bfe2c416e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dolifusekaxug.epizy.com/34801093690.pdf
    • https://s3.amazonaws.com/baxegezivumi/77721647788.pdf
    • https://s3.amazonaws.com/dazinibonofobi/nancy_drew_and_the_hidden_staircase_2019_soundtrack.pdf
    • https://uploads.strikinglycdn.com/files/2c361bba-1ba9-4dd0-b520-812117e9cd09/29217137345.pdf
    • https://uploads.strikinglycdn.com/files/620dbc83-f463-4ce0-95fe-63d9cf19afe4/52490020083.pdf
    • http://renodiwug.epizy.com/29046434200.pdf
    • http://garaloxuvenuwin.epizy.com/fuwedodupak.pdf
    • http://potimafekun.epizy.com/solid_converter_v9_full_crack.pdf
    • http://pasivete.epizy.com/car_racing_game_free_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001009b.bin
015aae364c486f2b4c85bef13aef6e444d4fad6822b83d7172fe7b8638ff255c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1009B 5456 bytes
font_01_sfnt_off00011337.bin
40eb8ad429b7345214bba856e890b1e383ecb801a9c4e1906e16758c6d8181c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11337 11196 bytes
font_02_sfnt_off0001396a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x1396A 4324 bytes