Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d4b5fdbfa2731f…

MALICIOUS

PDF

70.1 KB Created: 2021-02-04 02:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: eb887dfc9c274d25a6999e4886d45ba6 SHA-1: a58d71cf16cc95e29728036f0175ec8e09fe398e SHA-256: 50d4b5fdbfa2731f14474eb1c7e5c59febf6bcc0c89289e1f29c4170f75a232b
244 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
  • 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.
  • 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.
  • 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.
  • 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=eastern+metal+securities+investigation In PDF document text
    • http://peskomment.ru/samsung_s8_plus_split_screen_2019hip99.pdfIn PDF document text
    • https://cdn.sqhk.co/netimupoxojo/HNz4jf6/nba_g_league_ignite_roster.pdfIn PDF document text
    • http://avbox.org/9015817641jy11r.pdfIn PDF document text
    • https://mosezusimoz.weebly.com/uploads/1/3/1/6/131637881/9423773.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/sawuvosajupaz.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/jejjenq/regomafatixi.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/ageFNha/vegizesifavareberabafi.pdfIn PDF document text
    • https://vetolotex.weebly.com/uploads/1/3/1/3/131379132/8b42090e4.pdfIn PDF document text
    • https://mavabebuvaxar.weebly.com/uploads/1/3/0/8/130814237/9453829.pdfIn PDF document text
    • http://bluetea.space/nuwapakimokebedokuqsrqe.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/JhMiaii/66921968855.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/OC7hhK6/wheels_on_meals_blu_ray_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxaroposa/higc2uQ/livestream_mass_nj.pdfIn PDF document text
    • http://serviceforyou.site/vasobazudixovusubola36ftk.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/votuweroxigezog/35746138814.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_off0000d5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B9 5136 bytes
SHA-256: d24e74fb5b52f23815e3867e00632089ad26f3d02ee2fe3cd939b106f1e0fbaf
font_01_sfnt_off0000e729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE729 10700 bytes
SHA-256: 8eeb9ee173046dccba9d3097cc4f634b74646f7db3481ff66fefd037ce749f72

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