Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b377d4f087e3f24…

MALICIOUS

PDF

76.7 KB Created: 2021-03-01 01:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0e3a6e6a82fddae1f4e5b43e00aa086f SHA-1: 501b0522860c0156794d33c7ae319bc00a2a9bbb SHA-256: 7b377d4f087e3f24b66228f42c654116ee826cbd415c67be24dbc48b78377695
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=big+fish+and+begonia+full+movie+chinese In PDF document text
    • http://levelupguild.com/gout_treatment_guideline3n1kw.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/5Ulhfig/broken_hill_road_trip.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/hdMjaSI/mercury_retrograde_october_2020_dates.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/jifVggQ/running_fred_cheats_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/hahhjdr/when_do_license_plate_stickers_expire_illinois.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/PhaQYhd/38851274928.pdfIn PDF document text
    • http://startbastar.online/how_to_program_a_ps3_remotemhx61.pdfIn PDF document text
    • http://kapusta.pro/zixitutosuwazu7cr.pdfIn PDF document text
    • https://cdn.sqhk.co/xubafofin/heggift/zoveni.pdfIn PDF document text
    • https://cdn.sqhk.co/laxegipo/hbcFgd7/parallel_space_64bit_support_1._0._3053_gg_signed._apk.pdfIn PDF document text
    • https://cdn.sqhk.co/voxobidivel/fifHjai/skylanders_academy_castellano_mega.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/bicgdRx/economist_subscription_automatic_renewal.pdfIn PDF document text
    • http://chambreapp.xyz/fawosobuv51okr.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/ijUiiji/pijowewedut.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/moduxanakuri/65758009337.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/sinusitis_guidelines_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/good_morning_images_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/kikizibokojuputitapaz.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_off0000ed31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED31 5588 bytes
SHA-256: 744843d5d3dc7350cf3f8e1b4ddff9ea32144b23435e36d7efa4122f31393e13
font_01_sfnt_off00010022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10022 10968 bytes
SHA-256: f830c42c014273e17886af0169db1f86cce701eecab7579327c568c7cc2bf0c9