Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9871efea804f8a…

MALICIOUS

PDF

69.5 KB Created: 2021-03-12 21:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 32b9c35135064a793d86a1fc5b557fd1 SHA-1: 1356b96491b9db745403efb2889b7f80818cd5de SHA-256: dc9871efea804f8ac7150def1f6b2fda9a68615ec05c0f127a4513fccc4daeb7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'zajinet.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to movie content.

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://zajinet.ru/123?utm_term=malayalam+new+movies++2019+isaimini PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402297/normal_5fda70b79073b.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/47190976897.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/starbucks_coffee_cups_with_lids.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/smart_goal_setting_worksheet_for_high_school_students.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/bixaverixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_601bfd1317fc7.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/national_rice_cooker_manual_sr_mm10ns.pdfIn PDF document text
    • http://rabevazilogu.iblogger.org/ripojuzanexofazebezolanix.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/12706253237.pdfIn PDF document text
    • http://76014.nnmcloud.ru/d?s=YToyOntzIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/dodad.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/18034252932.pdfIn PDF document text
    • http://nafakosoleg.epizy.com/gaweserirulajepobijaxuwuw.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/hunchback_of_notre_dame_musical_character_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/que_es_la_inteligencia_para_la_psicologia.pdfIn PDF document text
    • http://labasir.epizy.com/memotitazidofojexu.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/lunumeko.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/how_to_set_up_intermatic_wall_timer_tn311.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/xiluvewaxikake.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/54695065341.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13A 5476 bytes
SHA-256: d7eb166286c87591b06e9897e76747d3a60fcb809e972a6cbe6fd4b1089ed6f2
font_01_sfnt_off0000e3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F1 10824 bytes
SHA-256: bda79a14e29c432cab38e0e16fdf7e9037f7c7c30f0f4eb39ec44744e1daf11d

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