Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe94645d021bc99…

MALICIOUS

PDF

72.7 KB Created: 2021-02-27 07:32:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 84e17dec2c5b5e18b90b63f9a6643812 SHA-1: aa81e68b04dd3093fbf0b33532435954771d24b8 SHA-256: cfe94645d021bc992f1a3162717a58661bf80d3de5b744f0113635bbd266debb
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/award?keyword=how+to+open+a+brinks+lock+box PDF link annotation
    • https://futafapegimato.weebly.com/uploads/1/3/1/8/131855997/3295642.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/dgjges6/vuwetaveravapamidogafe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410206/normal_5fdeae030c3b3.pdfIn PDF document text
    • https://bunupujitoj.weebly.com/uploads/1/3/4/0/134017728/kusagijedokubizisita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450338/normal_602140b9e0b82.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/Piawpif/rescue_mission_donation_center_roanoke_va.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402964/normal_5fd7daa058534.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416319/normal_5fece79a0217a.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/jdUijjo/jusal.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/ijgfgcH/whisper_app_download_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5fd63ff592404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_602fc28d97942.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/jarirotexab/49848006978.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/how_to_fix_disc_error_on_wii_u.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/28912327069.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/football_manager_2018_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/1000_english_conversation_phrases_that_seem_easy.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_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 5252 bytes
SHA-256: 4411c8eb8c8a748d6832ccb0500f0d3f1b61ece63d7d549ce12da06f80a6ffd5
font_01_sfnt_off0000f381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF381 9984 bytes
SHA-256: 431ddf40f6c8c3b24ff4fd94375a1057c3fd2d54bc7b1c36dd51cda99f0d24b3