Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4dbd059311642e8…

MALICIOUS

PDF

81.9 KB Created: 2021-04-11 11:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49694f33863ca4e7d4d5aa9803551897 SHA-1: 40e2f0970fbbf6dc6f9cc246b8025c49e41c9ffb SHA-256: e4dbd059311642e812644a25222026d8ebfe2249d2492e9632137fb1371654ef
116 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, aiming to trick users into calling a fraudulent number. The embedded URL points to a suspicious domain, likely part of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://kuzutuzo.ru/strik?utm_term=where+do+you+put+tens+pads+for+sciatica
    • https://cdn.sqhk.co/bodujemep/e2Njgid/one_bottle_dj_song.pdf
    • https://cdn.sqhk.co/regomesu/chaCjfJ/easiest_piano_songs.pdf
    • http://forajadafogaxuv.medianewsonline.com/steering_the_craft_epub.pdf
    • https://cdn.sqhk.co/pefevepufi/jaZhgob/download_devil_hunter_eternal_war_sea_mod_apk.pdf
    • https://cdn.sqhk.co/gepabafi/gwA5ic8/line_official_account_call_center_thailand.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bidivo/motorola_verve_buds_pairing.pdf
    • https://s3.amazonaws.com/tuzamada/solidworks_tutorial_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/d2405774-cf59-4343-bc60-1788e852376b/11465313193.pdf
    • https://uploads.strikinglycdn.com/files/4b736897-352f-4380-9c29-0339fdb80bec/autocad_2020_vs_autocad_lt_2020.pdf
    • http://rizivubonulej.atwebpages.com/89784432103.pdf
    • http://nejimafalun.onlinewebshop.net/62636111649.pdf
    • http://pevipitoz.atwebpages.com/35238378689.pdf
    • https://s3.amazonaws.com/faxaxos/pixud.pdf
    • http://xuvekixofeku.onlinewebshop.net/rogofarijazofebegedafagi.pdf
    • https://s3.amazonaws.com/muvarelo/atoms_to_moles_worksheet.pdf
    • http://vorisenunajix.myartsonline.com/51521060491.pdf
    • https://s3.amazonaws.com/gixawetopoli/15845990079.pdf
    • https://uploads.strikinglycdn.com/files/9d54164f-628e-44de-9fe8-c1f98adf5bd4/duvenorisuwoliminojaretuz.pdf
    • https://s3.amazonaws.com/xefezesebusu/6306956644.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_off00010301.bin
394fed70aafa7866c6c487b8e5fcade358a1e49ec6b71bbb21a93bccbce94a21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10301 5324 bytes
font_01_sfnt_off00011533.bin
28daf1a17ab183f4ca1d359412c440d77fa162dbccdaaa8ae1bc83d0f3e0452d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11533 10832 bytes

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