Malicious PDF — malware analysis report

Static analysis result for SHA-256 3739ce6e44f9c3d8…

MALICIOUS

PDF

69.7 KB Created: 2021-01-28 10:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9c46d01a7af9dad8be0d7cd404b44bd2 SHA-1: 1f67a8545fae7ea3cb3601fe6f436e009213f3b0 SHA-256: 3739ce6e44f9c3d821d106eaeae3f9c7472187aeb486737d46f448a5ad7a761a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wb?keyword=san%20andreas%20flying%20bird%203d%20model PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416132/normal_5fcdf7035f48f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464851/normal_600c7a706f846.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466370/normal_60071c99d6856.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/ihhgia8/camtoplan_ar_measurement_tape_measure_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5fd108d43ab4c.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/jdC6iPz/centurylink_customer_portal_login.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jgOBNih/92646011261.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388620/normal_5feb5b0d070e0.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/hbYT3Kt/lucky_food_market_near_me.pdfIn PDF document text
    • https://dizufarul.weebly.com/uploads/1/3/1/3/131379939/f1d1b1af7400.pdfIn PDF document text
    • https://lodikesilir.weebly.com/uploads/1/3/4/8/134868057/rejig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402938/normal_5fef95063aa50.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/kefodek/spongebob_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/dafulufafururakeru.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/ryzen_3000_build_guide.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_off0000d3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F6 5736 bytes
SHA-256: bea8d70197482ce7ff5ae6296fcb0f0f9d8dbcb699a19f2a4b030d8744ac2ce3
font_01_sfnt_off0000e771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE771 10264 bytes
SHA-256: 60166e90f6ee693222fd39ba41438771dfa74e04dd7341f8ee92c5bf2d707213