Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee95381c3c6e7665…

MALICIOUS

PDF

76.5 KB Created: 2021-05-13 17:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1ea292941c24f886311b12bd157b13e0 SHA-1: 2147a78b03deb30682f488ed4efceccef4d9d6da SHA-256: ee95381c3c6e7665b6ef4ec3a8f2c8480ed19cb527b8c42fc031596aa4067b17
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or redirectors, indicating a link farm designed to obscure the final malicious destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

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://gimoguvi.ru/strik?utm_term=acurite+digital+waterproof+thermometer+review PDF link annotation
    • https://cdn.sqhk.co/jakibefivi/i8T2Br5/9283747235.pdfIn PDF document text
    • http://uscreditreport.info/brother_lx_3125_manualnwmi6.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/eghWjbG/sing_king_karaoke_on_youtube.pdfIn PDF document text
    • http://madamzero.com/zebco_202_reel_disassemblyf4tjk.pdfIn PDF document text
    • http://mazers.fun/sonubulfqdv8.pdfIn PDF document text
    • https://cdn.sqhk.co/mafozerekat/iUggien/tumblr_couple_photography_quotes.pdfIn PDF document text
    • http://autokenn.com/tafununijan.pdfIn PDF document text
    • http://wegixaro.iblogger.org/silodotufivugedu.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/Ff0Bjj6/8391427009.pdfIn PDF document text
    • http://kakaxazirobolob.iblogger.org/easy_piano_christmas_songs_free.pdfIn PDF document text
    • http://axecheat1.xyz/how_to_see_who_login_my_facebookhcqv8.pdfIn PDF document text
    • http://supermagazforsale1.xyz/deputy_minister_of_correctional_services_contact_details1sv6l.pdfIn PDF document text
    • https://cdn.sqhk.co/wotutovebo/eixhjZ5/international_business_board_game_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/sobetevod/0jfSegj/natchez_ms_state_park_cabin_rentals.pdfIn PDF document text
    • http://idealica-uficialeitalia.website/65064972847ox1wm.pdfIn PDF document text
    • https://cdn.sqhk.co/gitopedevid/aiigdig/battlestar_galactica_starship_battles_vs_x_wing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ximumipos.rf.gd/44849346567.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/pufugemelatigidemejenuvoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/my_hp_photosmart_d110_printer_wont_print_black.pdfIn PDF document text
    • http://zewuxulaza.rf.gd/fluke_435_user_manual.pdfIn PDF document text
    • http://jazifuz.epizy.com/tazanagezobenu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA15 5532 bytes
SHA-256: cc30fee139a88dd6034f14544ce522d519137189a8773762b6ca3721a7dfade8
font_01_sfnt_off0000fcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 11656 bytes
SHA-256: b24eaa4b60cea27a891eaea67d67046eb77807ace2b5dc4677cd3b85590dcff1

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