Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57318d175167267…

MALICIOUS

PDF

125.5 KB Created: 2021-03-06 16:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2a104ff72723cf932e190c9037ed4f6b SHA-1: 93b0114e6ce55a30b49d987bf95b458823570bb8 SHA-256: f57318d175167267738b7e8bc773ab124469c43a2bfe078d0f29aa0913efd7ef
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, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into downloading further malware or visiting a phishing site. The document body, though heavily obfuscated, appears to be related to a search result for a product manual, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=craftsman+5.5+hp+17+rear+tine+tiller+manual PDF link annotation
    • https://cdn.sqhk.co/kubepugemaki/JOjgOOy/1_se_100_tak_roman_number_chart.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/tutufadakufoxuvuguguf.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/jasavasaregubawigopegafa.pdfIn PDF document text
    • http://jijuduli.mywebcommunity.org/46216041590.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/67585830241.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/dPgi0jc/nebirerigakavojofufaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/3UBY1DX/loledafigepirakudojil.pdfIn PDF document text
    • https://cdn.sqhk.co/xafemepino/gehag7s/principles_of_management_notes_for_mba.pdfIn PDF document text
    • https://cdn.sqhk.co/fabokofe/Wywgiic/yeezy_350_zebra_outfit.pdfIn PDF document text
    • https://cdn.sqhk.co/dudilirugido/gjfjghh/duck_life_space_full_game_unblocked.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/forupokisip/wavolatasimepodulosineme.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/81471892332.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/boss_movie_song_dj_youngster.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/lidimukutukizegenejifuso.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/strategic_marketing_process_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/ayo_and_teo_rolex_dance.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/linksys_wireless_g_access_point_software.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/cambridge_school_dictionary_android.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/91743919416.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/perogisakifututivex.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/xunefetaxujuvuxapij.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/legal_compliance_matrix_template.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_off0001a4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4E7 5332 bytes
SHA-256: 128c63c78928e139131e13a0548fabead1962bd625ca124e21b63fed7db09e01
font_01_sfnt_off0001b6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6F3 16100 bytes
SHA-256: 7a21d36a4e4695a049db0b92b2f7159daacfecfb61ad6f9909762339bd22773e

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