Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6fa172c94f21245…

MALICIOUS

PDF

67.4 KB Created: 2021-03-15 08:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5ce4abe39adba2f1df2b152ee8eca666 SHA-1: 76a5a304508a1c88321ce736dabaddb5cfd298c8 SHA-256: b6fa172c94f21245c949b54269cd58ce1a62b8c1bbf46b60d5a87cb474ed6562
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 0.9993

Heuristics 5

  • 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 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://bologen.ru/123?utm_term=autonics+mt4w-+dv-+4n+pdf PDF link annotation
    • http://gemotebefid.22web.org/1987_bbc_tv_series_my_family_and_other_animals.pdfIn PDF document text
    • http://sdek-24.cc/zepigijodikudunekera2sb.pdfIn PDF document text
    • https://cdn.sqhk.co/lukavago/Shihjgf/black_hole_3d_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/zufutetuwume/jjsMcnc/nedamomale.pdfIn PDF document text
    • https://pukakanasosakum.weebly.com/uploads/1/3/5/3/135392678/9043756.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/wugowozujotejudaniwfzq.pdfIn PDF document text
    • https://napokepuwaju.weebly.com/uploads/1/3/1/1/131164128/fubolol_vavatu.pdfIn PDF document text
    • http://hookup671.site/sidepigzqajw.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/gcgjjiD/befumiwanalovofokadomijib.pdfIn PDF document text
    • https://gesunewa.weebly.com/uploads/1/3/1/4/131438127/tiwolamojiz.pdfIn PDF document text
    • http://tonerinkstore.com/guest_post_outreach_email_templatew5e37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5fe15f7d9ebcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366976/normal_5fc9e6a9ce7d5.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/ihbihgj/wrigley_s_juicy_fruit_chewing_gum_ingredients.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481417/normal_6020fee730d71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vowefaxi.epizy.com/calligraphy_letters_a_z_practice_sheets.pdfIn PDF document text
    • http://xetubuvij.rf.gd/37261259794.pdfIn PDF document text
    • http://vekamujibatebig.rf.gd/blitzing_biology_11_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47df241b-8a27-45a8-a2ea-a270c22af4ec/sisigag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d8f7932-5f61-4557-a3d5-c13bdab6c860/mesezavupoxirota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/443e3af5-d1ac-42b9-8f3d-de8a6d6e62f3/my_dyson_dc16_keeps_cutting_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac727cd0-4af1-4306-9339-9d89febe07d8/gigivadoviburivujidore.pdfIn PDF document text
    • http://nelodetasa.rf.gd/carrom_disc_pool_mod_apk_android.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_off0000ca36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA36 5224 bytes
SHA-256: c38816ef7568a267db72fd1caa9799a46726d90311a4bb4c169f47b881f53dcf
font_01_sfnt_off0000dc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1B 10624 bytes
SHA-256: 599c2550aa30464938a25329b4f340a347eefb31510999acac685e20ac142bc6

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