Malicious PDF — malware analysis report

Static analysis result for SHA-256 6669c15dd5d60fc9…

MALICIOUS

PDF

83.0 KB Created: 2021-05-02 15:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 553ef718e34101e24dd9d2099995cbd9 SHA-1: 2465c6a0734671aabdac7e99facde2a021ab4f8d SHA-256: 6669c15dd5d60fc9ded9d272ebd4f00327690f3b644ca280f2ce4659d40a2cfe
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a likely attempt to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/strik?utm_term=star+trek+voyager+initiations+imdb PDF link annotation
    • http://ufenmac.com/generos_literarios_epico_lirico_y_dramatico_ejemplosjcxxx.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/ngjhb8O/3d_printed_mask_frame_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/xororasomig/gjNidhb/2540394811.pdfIn PDF document text
    • https://dimawirosaj.weebly.com/uploads/1/3/3/9/133997296/5810526.pdfIn PDF document text
    • http://rerixen.scienceontheweb.net/30439083965.pdfIn PDF document text
    • https://vokugovu.weebly.com/uploads/1/3/4/5/134598923/vuxipinalaroz_fonilelakago.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/do_beats_studio_3_wireless_come_with_a_charger.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwuwoki/gzBEMFk/antibiotic_for_common_dental_infections.pdfIn PDF document text
    • http://allieshouseofhope.com/501464189537zoig.pdfIn PDF document text
    • http://lesantyqas.online/woguwewotovituxozawoxon8ycm.pdfIn PDF document text
    • http://sdfafq.info/directv_music_choice_channel_guideqavyh.pdfIn PDF document text
    • https://xenuwupe.weebly.com/uploads/1/3/5/3/135329542/923285.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/ggg3QZy/dji_drone_remote_controller.pdfIn PDF document text
    • http://joxezorov.mywebcommunity.org/fungsi_organel_sel_hewan.pdfIn PDF document text
    • http://mailedflkf.site/553602849606nkxs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fujesotes.epizy.com/mexudetizategoxaxapale.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/57855811578.pdfIn PDF document text
    • http://vokifanebol.rf.gd/69659166421.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/nuvokejinodosobovutisowaf.pdfIn PDF document text
    • http://kiwusumusi.rf.gd/descargar_libros_de_energia_eolica.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/geerhardus_vos_biblical_theology.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/xurabosarujegunotajam.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/75682477151.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 5372 bytes
SHA-256: f71a632e920353c18aa9b5501558075fddb62b9a4f55d05a901a6ea86ca3e8da
font_01_sfnt_off00010bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB8 10756 bytes
SHA-256: b17ef9e31c4995a7df0d0de52f1d5abd2c131d06c1d77a3b951c7e96e2f6a3fd
font_02_sfnt_off0001303e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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