Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6f743a2c71f39a…

MALICIOUS

PDF

98.7 KB Created: 2021-03-05 22:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 88b7440883cc2f1f6ec42e0b03994a18 SHA-1: 393233991dc8ce6685a0c27140384f0acd668ba4 SHA-256: 7a6f743a2c71f39a23a67afeef765b98c7f6ba991fec90caea91c494c8869dd4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/wix?keyword=honda+eu2000i+generator+parts+diagram PDF link annotation
    • http://eeeeeyyy.space/dart_league_schedule_templatey9vvt.pdfIn PDF document text
    • http://rabota-plus.club/58055228244d8p98.pdfIn PDF document text
    • http://jotitojimo.mygamesonline.org/giporodopuweworezegame.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/que_es_la_madurez_espiritual_catholic.net.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/niv_application_commentary_romans.pdfIn PDF document text
    • http://midarujiwuvi.mygamesonline.org/how_to_reset_a_fx-115es_plus_calculator.pdfIn PDF document text
    • http://tesocoin.online/29504587226ij82l.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/singapore_math_syllabus_kindergarten.pdfIn PDF document text
    • http://nashremont.site/best_english_speaking_classes_onlinesbf3q.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/what_is_california_roll_crab_made_of.pdfIn PDF document text
    • http://sakabeg.iblogger.org/gogemilo.pdfIn PDF document text
    • http://static-get.top/nirvana_shatakam_lyrics_in_english9qbqz.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/what_does_an_itchy_beauty_mark_mean.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/ar_10_lower_blueprint.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/whirlpool_conquest_refrigerator_parts_diagram.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kakapefetabol.rf.gd/lamumaxegiwaxob.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/jewotobokumesurezupis.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/journey_to_the_center_of_the_earth_2008_full_movie_in_hindi_download.pdfIn PDF document text
    • http://tejugezefufuli.rf.gd/pametubugagodugetigug.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_3ef870cee84748438642e46685d0814e.pdf?index=trueIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_b9e8669a5e0c4d8da487714acf4616dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisiku/camera_icon_missing_in_android.pdfIn PDF document text
    • http://lixazavifamu.rf.gd/baniseviliweg.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_off000138c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C5 5480 bytes
SHA-256: 43a116ff933a832295d1daf262f698af1879a5f9d0dcdd271ee0f2860abb79c0
font_01_sfnt_off00014b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B50 16028 bytes
SHA-256: cbf26432e06694500266acfd5e4277f06375bbfb2ee9d280258450554145fe3f

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