Malicious PDF — malware analysis report

Static analysis result for SHA-256 601ea1f505c552c6…

MALICIOUS

PDF

80.0 KB Created: 2021-03-22 01:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2b43e13f17b4d37980f08ab42f4527fd SHA-1: bb3c3b5b77f1615b03633fbd12a07c24118ff8f2 SHA-256: 601ea1f505c552c65ba3d42bc8f0d6be4638342a4851f6c9a28b6469619bf53d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://crophysi.ru/123?utm_term=glary+undelete+free++for+windows+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421213/normal_6030813ba2bab.pdfIn PDF document text
    • http://nunesop.scienceontheweb.net/cash_flow_statement_full_chapter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496372/normal_5fed1ade24e9b.pdfIn PDF document text
    • http://lalabomujulimof.mywebcommunity.org/81396197215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372376/normal_6057befdaf720.pdfIn PDF document text
    • http://streamsweets.com/yahoo_sports_fantasy_football_cheat_sheet_printable5od9m.pdfIn PDF document text
    • https://koxewezadopu.weebly.com/uploads/1/3/4/0/134017906/mofakitunonoguxoj.pdfIn PDF document text
    • https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/6564104.pdfIn PDF document text
    • http://xenuven.22web.org/kalafumu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482216/normal_5ff781ff4ba17.pdfIn PDF document text
    • https://xisaxori.weebly.com/uploads/1/3/5/3/135324705/d245a221.pdfIn PDF document text
    • http://nidikasuzarola.iblogger.org/new_york_giants_post_game_report.pdfIn PDF document text
    • http://nout-sale.site/hedgehog_wallpaper_phoneg21qm.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/traducir_archivo_en_ingles_a_espaol_gratis.pdfIn PDF document text
    • https://nelejejo.weebly.com/uploads/1/3/4/8/134883178/suxog-nonobepi-zeduf-nolabi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370078/normal_5fee8a0ca27f7.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/how_to_use_a_manual_inflate_blood_pressure_monitorj22k7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371814/normal_604ed84d0d075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_601b96ef8d5b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410201/normal_5ff3dadf2fca6.pdfIn PDF document text
    • https://sivabujik.weebly.com/uploads/1/3/4/0/134017760/e2ce21d080eb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merazajujivu.epizy.com/fifep.pdfIn PDF document text
    • http://vanumezaxibet.rf.gd/sistema_circulatorio_para_nios.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/xezivowi.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_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 5204 bytes
SHA-256: c091de3c40cf5f607de13198b045b4b34ca0fd9a40a49deb21675fd342a80b14
font_01_sfnt_off000109c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C0 12076 bytes
SHA-256: 77f1abe289cb8a6ff8ee025d825ffc8f90cd541d15568290cf9d13982c9d860e

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