Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a382ef8bae4d1c…

MALICIOUS

PDF

84.7 KB Created: 2021-03-29 21:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6bb86be2cd0fa9522a6dc89d8a62d39 SHA-1: b96c68b591b0dd36c490df8a2d6a2450a95b29ed SHA-256: 10a382ef8bae4d1c12f9cd515d6dc07ac8852e4d66f4a7892cf03ba29fb2d413
96 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically pointing to a malicious domain associated with phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/award?keyword=mahalaxmi+calendar+2020+download+pdf
    • http://pomuropujuj.22web.org/goalkeepers_report.pdf
    • http://differencecheats.net/fiocco_allegro_sheet_musicr2tu8.pdf
    • http://domodip.iblogger.org/93255089005.pdf
    • https://cdn.sqhk.co/parabeset/Pifhbdw/piwuxezozamujokilel.pdf
    • https://static.s123-cdn-static.com/uploads/4476152/normal_5ffdc89b555fc.pdf
    • http://checkmyscore.info/vekezosudozekoji82aqk.pdf
    • http://lifegirls.site/92062862308xg5xe.pdf
    • http://podarokinsta.online/94745292696e9707.pdf
    • http://momentikshop.space/the_easy_way_to_stop_drinking_allen_carr_freea0a29.pdf
    • https://cdn.sqhk.co/fosuzonarefi/eidDgcx/grammar_and_spell_check_free_software.pdf
    • https://static.s123-cdn-static.com/uploads/4370077/normal_5fdfbfa1491d0.pdf
    • http://fruits-summer.fun/oxford_dictionary_full_apkjbgqe.pdf
    • https://cdn.sqhk.co/jokawefezo/3YhghgA/48755887347.pdf
    • http://ubsvp.com/96308741326do9br.pdf
    • https://cdn-cms.f-static.net/uploads/4407749/normal_603534d4bbbf0.pdf
    • http://revershjtb.site/7343433809dvx9s.pdf
    • https://cdn.sqhk.co/fexejikexew/oOibOkn/7128638930.pdf
    • https://cdn-cms.f-static.net/uploads/4463824/normal_5fd12c3800a4d.pdf
    • http://ecoterritory.store/joravofezuwusopfq194.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://wedukifolinewa.epizy.com/rixalokiwef.pdf
    • http://topadut.epizy.com/consumer_reports_best_car_seats_for_toddlers.pdf
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_87ad6e7db5f44a228772bd5eb90722d3.pdf?index=true
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_9e231a68a2804d838f6f313a3726d0e5.pdf?index=true
    • 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_off0000f75d.bin
aa4397b8f7dc85657037d3cb5816243a11f69399fec7eb2442add41b1a0bc9a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF75D 5656 bytes
font_01_sfnt_off00010a93.bin
93d739bc054c65d4e5ef144bf8ebf94784ee5033111250e3590e3356466f0538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 11620 bytes
font_02_sfnt_off000130f8.bin
c4c26d28a2acd5f13e140666fd94c5b9f93156f47798998144747a71704dc95f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130F8 5336 bytes

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