Malicious PDF — malware analysis report

Static analysis result for SHA-256 9585b12d2b53d12f…

MALICIOUS

PDF

76.8 KB Created: 2021-04-07 09:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0d5befaa4961ac8b453182d8e18f6c1f SHA-1: de7f622ee76c0f424fb20335a13b4972cadf6b3d SHA-256: 9585b12d2b53d12f3789e36258dc0cca66a1cab9a398f23a5c3b647124692d4f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=how+to+repair+a+sloan+flushmate PDF link annotation
    • http://presente-top.store/abcd_2_movie_video_song_hdck35f.pdfIn PDF document text
    • http://rkconstructionsucks.com/twisted_mountain_climbers_benefits5es50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_5fe6bbcea797a.pdfIn PDF document text
    • http://astrohelp.space/broken_heart_status_video_for_whatsappzwaej.pdfIn PDF document text
    • http://idealicaitaly.site/xasagetozapejanasre4t.pdfIn PDF document text
    • http://usacarins.com/business_letterhead_format_samplebzkny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444636/normal_601e566bbd5c9.pdfIn PDF document text
    • http://blog-millionaire.buzz/bridge_wallpaper_hd8xvko.pdfIn PDF document text
    • http://myyshooop224.site/95318578407q004o.pdfIn PDF document text
    • http://100naturals.fun/12140041058egunm.pdfIn PDF document text
    • http://steblin.pro/nuance_power_3_free_downloadt8o5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_6016ffdd12738.pdfIn PDF document text
    • http://cmbmarketing.agency/44016320642ynh7g.pdfIn PDF document text
    • http://regsenatvumen.website/how_to_promote_using_twitter7f1xy.pdfIn PDF document text
    • http://zavodtriumf.com/juzigawujulatuvebalutigeohhu4.pdfIn PDF document text
    • http://cheatyou.site/how_to_make_mead_vikingtvgar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5fdb0243ad3b6.pdfIn PDF document text
    • http://neo-tp.ru/singer_simple_sewing_machine_3116_bobbinscl04.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/jijumupade/idabel_ok_police_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/samsung_galaxy_note_4_edge_price_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/boswells_school_sixth_form_open_evening.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53d3d94-1c4f-43b5-bb2c-bb114c81a377/what_do_the_numbers_on_steel_wool_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23133d1a-4bc7-4a57-868b-8ee28b49f2a2/review_of_between_shades_of_gray.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/autodesk_autocad_2019_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/can_you_shoot_a_bow_in_your_backyard_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48637974-8ec9-463d-a2ac-5b75bcdda029/voniduguromodakegipeguk.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_off0000ed63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED63 5192 bytes
SHA-256: c8ecff90912ab88a40191a3411d39a3cd46198fc0ec7246e119ea8b95d1b467f
font_01_sfnt_off0000fef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF2 10820 bytes
SHA-256: 23f44b33a3616fd11b97943107bccba0858413ad1b3713606e85fb8022dd8bfd