Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ec7b4e70a991f0…

MALICIOUS

PDF

78.4 KB Created: 2021-03-24 17:56:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49e41f1af577cb09de639d246933af69 SHA-1: d080eceb065e8dd5d23185147716fb4933af5d03 SHA-256: 19ec7b4e70a991f0fbc241afab7b3647dbc194d44ca4ce6af8cf75f40a78a9e7
104 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, contains text related to job interviews and urgency, suggesting a phishing lure. The presence of embedded URLs and the ML detection strongly indicate an attempt to deliver a malicious payload or redirect the user to a phishing site.

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pelibifir.ru/strik?utm_term=it+job+interview+questions+and+answers
    • http://kisikevofe.iblogger.org/answer_2_shoes_apis.pdf
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/fupunakulijeju.pdf
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/vovefunafugubobedi.pdf
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/mojewiwuz_vepadisegolipum_lemexefuvi_pexupufedan.pdf
    • http://fazojum.66ghz.com/70255393552.pdf
    • http://gemotebefid.22web.org/appium_android_browser.pdf
    • http://xafesuvorolivig.scienceontheweb.net/how_do_i_find_my_chinese_name.pdf
    • http://desekikimok.22web.org/android_room_tutorial_kotlin.pdf
    • http://tejidirexe.mywebcommunity.org/2020_calendar_with_week_numbers_printable.pdf
    • https://nusatugob.weebly.com/uploads/1/3/4/8/134865614/777669.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/31eeba0b-87bd-40e4-afaa-cbf144314f61/bose_companion_2_series_iii_watts_per_channel.pdf
    • http://liraderivuw.epizy.com/71230169938.pdf
    • https://uploads.strikinglycdn.com/files/4bd3b923-9166-4587-89cf-a8f1565323ee/74101365119.pdf
    • https://uploads.strikinglycdn.com/files/0b5dbc91-5911-43fd-83cd-732f41960aa4/what_is_the_paddle_attachment_for_kitchenaid_mixer.pdf
    • https://s3.amazonaws.com/didowugorokirug/intellicharger_i4_lights_meaning.pdf
    • http://dogefifuga.rf.gd/bury_me_a_g_real_1.pdf
    • http://jukikusikodopom.epizy.com/pekivaraxewa.pdf
    • https://uploads.strikinglycdn.com/files/a708fdbd-22d9-4bcf-94ca-339da1a8bcb7/78564695304.pdf
    • https://s3.amazonaws.com/posufij/angularjs_form_validation_pattern.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_off0000e77b.bin
220065766f23e2991193a549cbc3c1d8fe4487e8f90cc2079a145a72437a8d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 5100 bytes
font_01_sfnt_off0000f8e2.bin
509ed8b97b2e04a7e0cc34aa3b5094aa1a02cf78772e3521dd4cee4a26eb12ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E2 10756 bytes
font_02_sfnt_off00011dc3.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC3 4324 bytes

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