Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb83f1aca74337f…

MALICIOUS

PDF

60.7 KB Created: 2021-02-18 15:20:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 023d1574b093647439c96f89f72c700b SHA-1: ae8a389bc1d3bb322b4a45a1c9c103e69898bab9 SHA-256: cbb83f1aca74337f7ea0df630f324ab14eaf23bdb23e9bd9c31241df1c241123
136 Risk Score

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://bologen.ru/123?utm_term=how+to+clean+hp+officejet+pro+8600+printhead PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470389/normal_6026fde399c55.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/Yx56hhU/new_song_ringtone_2019_zedge.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/fPVmhis/zebububunuj.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/WPYSqNt/traffic_rider_apk_download_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_600e67fb395eb.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/bjbjfvV/54764218632.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/ihJIifN/alien_warfare_2019_trailer_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/gghe5ii/18818902699.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476288/normal_5fffe8f6e38b7.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/cWVYgjo/perfect_pancake_maker_pan_flip_jack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_6027832de46fa.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/va9idlV/happy_hour_water_game.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/sowirutelevolur/55784999325.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/kelvinator_2_washing_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/2018_albums_hip_hop.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_off0000b3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F4 5684 bytes
SHA-256: 02abc581206c4d4ae5a75ebd21a157b7447d97f67caf97321b4312c3a5914468
font_01_sfnt_off0000c75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75D 9008 bytes
SHA-256: c8165314a05840432d02339d51bbcbe08fc7ba22438effe86e8189e09c46d1c0