Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3657793633046b8…

MALICIOUS

PDF

85.2 KB Created: 2021-03-11 14:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfd963efcd8b8fc0673d8fa50225cbb3 SHA-1: bf61eaf3ad3dbe6cca96a90598a78e36254b39b7 SHA-256: b3657793633046b84c50f0f98e5c98f377c3bcc1625c6a19cccad29f79fd0d6c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'dafemum.ru', which is likely part of a phishing or scam campaign designed to trick users into visiting a compromised website. The document body, though partially corrupted, suggests a lure related to health products, further supporting a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/wix?keyword=opti+farms+keto+and+apple+cider+vinegar
    • http://tijudozi.scienceontheweb.net/35708702298.pdf
    • http://nusowutevu.getenjoyment.net/vusurigazoxivamasokekopas.pdf
    • http://dekagexagupeje.iblogger.org/energy_sources_and_conversion_worksheet_answer_key.pdf
    • https://cdn.sqhk.co/genonitag/d7hche6/aimpoint_pro_for_sale_near_me.pdf
    • https://cdn.sqhk.co/gojinuma/hjqidYA/57993945139.pdf
    • https://cdn.sqhk.co/fasegibuniz/jjgifhc/how_to_play_poker_at_home_without_chips.pdf
    • http://kimuzufar.22web.org/84109389377.pdf
    • http://zinekob.66ghz.com/training_manual_template_indesign.pdf
    • https://cdn.sqhk.co/boxewemutox/eijjfjb/judaai_badlapur_song_pagalworld.pdf
    • https://cdn.sqhk.co/feguzuvubut/ghhjhbV/25269876207.pdf
    • https://cdn.sqhk.co/bafiweba/7T1iiTz/kutitesaj.pdf
    • https://cdn.sqhk.co/kisesawaropo/qhfgckg/62605473959.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0279dac5-982f-43b3-bd69-212d9d96af02/can_alexa_turn_on_panasonic_tv.pdf
    • http://kakininutopojub.rf.gd/piwemifiv.pdf
    • http://sufumawug.epizy.com/sumproduct_vlookup_multiple_sheets.pdf
    • https://uploads.strikinglycdn.com/files/020296f0-7926-4a9a-ae36-0e50fcc38f69/pasenukolomode.pdf
    • https://uploads.strikinglycdn.com/files/b66a302b-1890-4a0c-9d1a-a22064b18c44/pemiliwokate.pdf
    • http://sonogobujajeva.rf.gd/sipavi.pdf
    • http://baxewape.myartsonline.com/mrityunjay_book_download.pdf
    • https://uploads.strikinglycdn.com/files/f97fb532-64bb-41c0-b51c-6679d545fff5/zaribufetuxorobidovowes.pdf
    • https://uploads.strikinglycdn.com/files/51d4e8d4-316b-4136-b8ee-36e7c0d2b337/numis.pdf
    • http://taleweja.epizy.com/adventures_in_babysitting_2016.pdf
    • http://mumeriladokovot.epizy.com/fagelujetasepodirep.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_off00011259.bin
cfbd133f3a9748f6f8e5eae218db45a3ae9a4e14120f3f1a3f4544aa088b6900		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11259 5628 bytes
font_01_sfnt_off00012572.bin
0ecdf05416d6730bcb05d8f9d025e5061844ffdc93f8aca23f11738ec443dca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12572 9688 bytes

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