Malicious PDF — malware analysis report

Static analysis result for SHA-256 0015ce3fed8f493b…

MALICIOUS

PDF

76.0 KB Created: 2021-03-14 11:06:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 84fceafccc279d678fb0dce0fd11c728 SHA-1: e9d843a7fdc411148f3f07b46832b734888cdacd SHA-256: 0015ce3fed8f493b9384d72019a5f25c6b2e216054b20edf9c6ded9ecc7db7ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, identified as a link farm by heuristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

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
  • 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://zajinet.ru/award?keyword=breakthrough+basketball+shooting+pdf PDF link annotation
    • https://cdn.sqhk.co/fujotojaxob/if1OtUt/chad_wallpaper_and_y_wallpapers.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/107601453007raq3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413969/normal_604d181798457.pdfIn PDF document text
    • http://nominasacra.ru/95459887583rg4bt.pdfIn PDF document text
    • http://manybigs.space/hentzen_coatings_safety_data_sheetztru3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446388/normal_6041b9e9798b1.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/minecraft_survival_servers_ip_1.16.2.pdfIn PDF document text
    • https://cdn.sqhk.co/wisivelu/Ghgha7o/dhak_dhak_karne_laga_song.pdfIn PDF document text
    • https://cdn.sqhk.co/lakodatoli/6UGjhiB/vezurifubajenef.pdfIn PDF document text
    • http://masito.space/formato_de_solicitud_de_empleo_para_imprimirc6e6n.pdfIn PDF document text
    • http://newsportstechnology.ru/lazibibilumoxuwesara50oo6.pdfIn PDF document text
    • http://vinnipoh.space/23199864017s4sab.pdfIn PDF document text
    • http://zofugef.mypressonline.com/49780365612.pdfIn PDF document text
    • http://sberetransfer.online/african_animals_picturesdp716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_60155c2231202.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/GjgigGV/basketball_legends_halloween_unblocked_games.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/66865748513eyfmb.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/ttPihjh/43745223160.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/47474696168.pdfIn PDF document text
    • http://online-bestshop.xyz/646750084642gkdw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 5556 bytes
SHA-256: 0267ce73af0bf14042c988a3c891eb02801fe3cf949688455db81d7637d34cff
font_01_sfnt_off0000fb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7F 11488 bytes
SHA-256: 4cee1dc1232231fe7bf2af7c3ed6ad0b42bd6d06875deed8282c1541ce2e2814

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