Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22baa038ca6f53d…

MALICIOUS

PDF

123.2 KB Created: 2021-04-04 09:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cbc913f4c289e38acbf62bd241294a6d SHA-1: 9705800f6f05097a42273ac5ed6b2834e55a4ace SHA-256: a22baa038ca6f53d328f36a5ebe6b25c3d62a610b28ae29f5cac541ba4973d40
136 Risk Score

Malware Insights

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

The PDF file was detected as a phishing trojan by ClamAV and ML classifiers. It contains an external URI and an image lure pointing to a redirector URL, both related to 'cinco ranch homeowners association fee', suggesting a phishing attempt to lure users into downloading malicious content. The file's metadata indicates it was generated by wkhtmltopdf, a tool often used to create PDFs from web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://fokemale.ru/wix?keyword=cinco+ranch+homeowners+association+fee PDF link annotation
    • http://rowewuxeg.getenjoyment.net/design_thinking_empathy.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/savoniko.pdfIn PDF document text
    • http://lotto-investclub.com/31023586713zgpr8.pdfIn PDF document text
    • http://retys.space/beats_studio_wireless_headphones_how_to_connectzuy75.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/tiketimeradedaxanezevi.pdfIn PDF document text
    • http://naturalgood.space/oster_toaster_oven_air_fryer_instructions2hgvw.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/maserati_granturismo_mc_coupe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/65bef7f0-3059-4811-a78f-614539b4946a/17818459950.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/attachment_of_earnings_form_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/braces_transformation_time_lapse.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/subject_verb_agreement_worksheets_with_answers.pdfIn PDF document text
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_3ab7d9d9846a49f5b30189f33b63f1e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9202c855-01e8-40c4-9e05-1424fc29340b/buxaziroga.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/would_you_rather_questions_for_guys_flirty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa67e5e1-8b05-4bd9-a009-a83a0fe9941f/2010_camaro_ss_edelbrock_supercharger.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/39932294800.pdfIn PDF document text
    • https://cc0b58a5-7bf4-4b41-9cd7-d9bc0cd2cc6f.filesusr.com/ugd/6dc98b_e008def5d40e4debbeaa4ede78e0fae9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/mapsource_trip_and_waypoint_manager_free.pdfIn PDF document text
    • http://mewabetowa.myartsonline.com/agricola_family_edition_solo_rules.pdfIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_2d6f1ac5bc224db8a446f7ef7285aa47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/thank_you_for_answer_my_email.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/faria_depth_sounder_transducer_installation.pdfIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_21b3f696d89246eea13f4d9d34810d12.pdf?index=trueIn 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_off0001a4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4F2 5084 bytes
SHA-256: d59739c5eef7a99200c7b05060fd373ea8d7d52e8b03a49fb289910ee9181a9f
font_01_sfnt_off0001b61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B61F 11992 bytes
SHA-256: 868e0d6e4eb9ef551c154ccc38c63f9d01ac553ad809f12273c68f98f814065c