Malicious PDF — malware analysis report

Static analysis result for SHA-256 e183416103502862…

MALICIOUS

PDF

71.6 KB Created: 2021-03-09 04:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4885012dd0651ee4dc8fd811374d82d2 SHA-1: a2cea9aa9dd0977bb2bad015d629d878242b8c3b SHA-256: e1834161035028624aa41a7607e7487ead5b1a865739ebd306003919fa99b13c
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure, suggesting this document is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=krishna+balram+movie In PDF document text
    • http://microbladingeyebrowsdallastx.com/auto_sub_guide3lgtk.pdfIn PDF document text
    • http://zinobinipote.22web.org/xetawa.pdfIn PDF document text
    • http://sale20.site/omnitech_paper_shredder_troubleshootingw6eiv.pdfIn PDF document text
    • http://bottlechainworld.com/najuga6q8yu.pdfIn PDF document text
    • https://vosewisujar.weebly.com/uploads/1/3/5/3/135398140/farinorufik.pdfIn PDF document text
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/78ff3.pdfIn PDF document text
    • http://habercigo.com/facebook_lite_windows_phone_8._1yrd6h.pdfIn PDF document text
    • http://selectgetc.top/webkinz_cheats_for_kinzcash_2017wvc4z.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/english_grammar_exercises_past_tensep1ydc.pdfIn PDF document text
    • http://xuwivezotuw.22web.org/simple_border_designs_in_a4_sheet.pdfIn PDF document text
    • http://hellesypakk.online/90907377143qf5gp.pdfIn PDF document text
    • http://bestplacefor.rest/jonesapozogidabaxuxulexoft028.pdfIn PDF document text
    • http://salonapp.xyz/cars_coloring_pictures_to_print7znyp.pdfIn PDF document text
    • http://tublitalia.space/spiderman_games_for_android_phonesqto2a.pdfIn PDF document text
    • http://klyshsheff.xyz/maytag_top_load_washer_dryer_reviews8k7gm.pdfIn PDF document text
    • http://life50it.pro/grim_grinning_ghosts_sheet_music_pianomd5fu.pdfIn PDF document text
    • http://shoop-fh.ru/organization_innovationqdgg8.pdfIn PDF document text
    • https://nerutemiwuxofa.weebly.com/uploads/1/3/1/3/131398157/zojejonitikoluritiki.pdfIn PDF document text
    • http://supportcopyright.net/dizugupesikevuxagabwo59t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gesesasogibigaw.rf.gd/bumper._io_voodoo_apk.pdfIn PDF document text
    • http://nedajazamofo.epizy.com/android_bitmap_get_scaled_height.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_off0000dd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD89 5096 bytes
SHA-256: c9c35d2d28acbe9b55750d49cbce136172b978a62abfd5bf74172e1236b9b612
font_01_sfnt_off0000eeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB8 10000 bytes
SHA-256: b3bd38b5c68696e720dd98c4f088e449847596f953d8e44fe2d01996c26436f2

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