Malicious PDF — malware analysis report

Static analysis result for SHA-256 335f6dc0c008749f…

MALICIOUS

PDF

71.1 KB Created: 2021-02-15 21:23:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a5c4b9bbf2736f0caa4fde0201a2c345 SHA-1: 1cc13745ca343c91827f6cca2fbe4d9b65f2646d SHA-256: 335f6dc0c008749ffffb840b849f10cff1e125d146648ccb3865fb56e44f0bc5
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=monster+legends+cheat+engine PDF link annotation
    • http://devicesprotectionforusers.site/denisj0x7z.pdfIn PDF document text
    • http://xavimelobuvi.22web.org/rockstar_social_club_windows_8.pdfIn PDF document text
    • http://goxuvux.22web.org/odia_album_ringtone_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/salefudodid/gVgfsEG/sushi_cat_4_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/A207Qjh/enerpac_hydraulic_jack_catalogue.pdfIn PDF document text
    • https://sididipukiwe.weebly.com/uploads/1/3/1/3/131398020/dakutodotako_remiv.pdfIn PDF document text
    • http://futup.ru/51798077422izsgn.pdfIn PDF document text
    • http://idealslimitalia-official.site/xopojotidasosotijirevkwv1i.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/bolovopizonuki/weather_report_kamalia_punjab_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/fimuboxobalipunale.pdfIn PDF document text
    • http://zegisaxan.rf.gd/angolan_civil_war.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/web_banner_mockup_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/flute_do_re_mi_sheet_music.pdfIn PDF document text
    • http://vagasobewinepu.rf.gd/gagexudubosebimep.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_off0000daf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF3 5208 bytes
SHA-256: 4a50af386e9dbaf5cbcec78dc0b348fe75e4a8c8fb132c30bc2f8d22fe8955ab
font_01_sfnt_off0000eca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA8 10552 bytes
SHA-256: 727b137899b029e8f8ffcd532ba2717bf7e7b3911d738f510beb6ef0ae452d44