Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ad887e00ef642e…

MALICIOUS

PDF

73.4 KB Created: 2021-03-03 22:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d939bdfe7d9b1f06450d7d2fe83437f4 SHA-1: b0bda9f29f79235f34a69ad4aad1d4b7abbe6724 SHA-256: 96ad887e00ef642e08110ee5c707e5af17eaf15953b8e3ccdd4b04135233c087
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 0.9997

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://dafemum.ru/123?utm_term=list+of+all+antonyms+from+a+to+z PDF link annotation
    • http://dotenipago.medianewsonline.com/que_es_eficiencia_en_administracion_del_tiempo.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/juzokujunazizixipuk.pdfIn PDF document text
    • http://mon-cmbretagne.com/taratasimeguguno6rllf.pdfIn PDF document text
    • http://cg-designer.xyz/115100059425fn5n.pdfIn PDF document text
    • http://lalashoppen.online/prizefighters_mod_apk_2._7_3dwacc.pdfIn PDF document text
    • http://haifaiv.ru/95065277358bk5p4.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/god_is_not_disappointed_in_you_verse.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/rockwell_delta_40-440_scroll_saw.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/hunger_games_mockingjay_chapter_12_summary.pdfIn PDF document text
    • http://nebofonuve.mywebcommunity.org/subajutokutefukowebudixul.pdfIn PDF document text
    • http://lomidal.mygamesonline.org/convertidor_de_gramos_a_mililitros_online.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/67514681845.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/kudowo/42160483905.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/54467973056.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/administracion_de_medicamentos_via_otica.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/rifavem.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/suvexipobojisosapuridemu.pdfIn PDF document text
    • http://sinusisokopex.atwebpages.com/mean_median_mode_range_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/47680272352.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/46009828899.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_off0000e33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33D 5008 bytes
SHA-256: 576e5e273f346e383386b4a33437be3bf2c7551dc34d6322e649bb5caf37e443
font_01_sfnt_off0000f442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF442 10876 bytes
SHA-256: a5e06bb2576d4d7a9b3bf5cb51cb175865699ffb97e8914c6e9d415ea48e713c