Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf69921fd25ede11…

MALICIOUS

PDF

79.4 KB Created: 2021-04-23 17:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea8ec1f6375d93f9e779bc5567e1321b SHA-1: d259a8fc23b4c7ef9e3f1be9077d0de61da93faf SHA-256: bf69921fd25ede11ff7e0ff84fb27b50773d0ec1dc312b9c6ad5c5ff151f3fbe
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'dafemum.ru' suggests the document is designed to redirect users to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=how+did+ancient+china+keep+track+of+time
    • https://cdn.sqhk.co/jadepibake/ifbtIgf/77447931357.pdf
    • http://porn77.design/aihw_breastscreen_australia_monitoring_report_2018te5q3.pdf
    • https://cdn-cms.f-static.net/uploads/4393190/normal_605bde8021bdc.pdf
    • https://cdn-cms.f-static.net/uploads/4389601/normal_60656678ce57a.pdf
    • https://cdn.sqhk.co/libuzewis/7Yhjhd2/83724043165.pdf
    • https://cdn.sqhk.co/gonolesuzam/ia7blpR/58628212281.pdf
    • http://zomosidotewe.sportsontheweb.net/how_many_beats_in_notes_for_music.pdf
    • http://axecheat6.xyz/food_safety_officer_question_paper_with_answersk3kak.pdf
    • https://static.s123-cdn-static.com/uploads/4424331/normal_5fdcb58d2ab43.pdf
    • http://nomenowunesazoz.scienceontheweb.net/wewov.pdf
    • http://pimifawimonidij.mywebcommunity.org/samsung_printer_not_printing_multiple_copies.pdf
    • http://wajofima.mywebcommunity.org/bixididagifativez.pdf
    • https://cdn.sqhk.co/xaranoraf/amiajhc/pokeball_game_android.pdf
    • https://cdn.sqhk.co/sixitigoxeto/2hAGgdk/carrier_aire_acondicionado_manual.pdf
    • http://italonewsero.site/695568094617qrnj.pdf
    • http://getfreecreditreport.info/what_does_it_mean_when_a_guy_says_he_genuinely_likes_you59i2z.pdf
    • https://cdn-cms.f-static.net/uploads/4483331/normal_604512f5df661.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zijiwaras.onlinewebshop.net/adverbs_exercises.pdf
    • http://womiwinimubejaw.rf.gd/inspirational_stories_in_telugu.pdf
    • http://vaxutusurinav.epizy.com/aligned_vision_laser_guide.pdf
    • http://fedokow.rf.gd/kewimo.pdf
    • http://sabaramofedofi.rf.gd/davukajiwa.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_off0000f770.bin
d60e7fb46313f84af6864f7c43b059c67f729bb6efbbdf00d4b993a21031b6e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 5304 bytes
font_01_sfnt_off00010961.bin
b700749f1b0d8c35546326ca14d34a5b61befc24f6e713e9148784f64495d660
pdf-font-stream PDF embedded font (sfnt) at offset 0x10961 11564 bytes