Malicious PDF — malware analysis report

Static analysis result for SHA-256 627ae46de3ca10b5…

MALICIOUS

PDF

98.5 KB Created: 2021-03-20 21:28:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3acbb9c1dfbfd260b9a9a318b8e43d48 SHA-1: 5fd0c51d29430b0e5d8a9bccdf140a14db33741b SHA-256: 627ae46de3ca10b5c9a810eaaea5d0d816b608916a4b54d8409e23ccb51ed12e
136 Risk Score

Malware Insights

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

The PDF contains multiple suspicious external links, with at least two explicitly luring users to download other PDF files from potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://xezojetit.ru/wix?keyword=fanuc+irvision+manual
    • http://znakomstva69.space/in_the_blink_of_an_eye_book_free_downloads9ojh.pdf
    • https://cdn.sqhk.co/luwesefizi/gcH2wCd/impression_management_dictionary_definition.pdf
    • http://leadtop.co/which_vampire_diaries_quizrdpcj.pdf
    • http://fesunasisodenod.getenjoyment.net/42073400308.pdf
    • http://pizixaranifasof.iblogger.org/carcassonne_spielanleitung.pdf
    • http://zavulibalox.mypressonline.com/los_doce_economistas_ms_importantes_de_la_historia.pdf
    • https://cdn.sqhk.co/votawusebak/OIZ5jdw/nearme_find_friends_nearby_on_snapchat.pdf
    • https://cdn.sqhk.co/losopodelim/Bgcide9/bus_driver_simulator_game_online_free.pdf
    • http://setlyb.online/1283992093180mnd.pdf
    • http://insurancesouk.com/what_is_the_measure_of_a_great_manz3fgz.pdf
    • http://managerprogram.live/super_mario_3d_world_isofubbm.pdf
    • http://samafutanub.mypressonline.com/how_to_learn_self_control_reddit.pdf
    • https://cdn.sqhk.co/pixorikibam/gdDgINA/palemife.pdf
    • http://ragofilud.medianewsonline.com/69376089359.pdf
    • https://cdn.sqhk.co/peferitukofa/jaCghjf/rozebuvifapo.pdf
    • http://xajabuzowa.scienceontheweb.net/farmacos_anticoagulantes_clasificacion.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fusopub.rf.gd/20337795194.pdf
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_0387f4e6244a4d9bbf9c7c5920488342.pdf?index=true
    • http://nibopinalilabaj.onlinewebshop.net/bushnell_yardage_pro_scout_review.pdf
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_6e3d61217f224bbdba1f3888e5e9a4e4.pdf?index=true
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_634ce2cefe304376b30cccf08975341b.pdf?index=true
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_6fd1c5aa757e4a2aa3bde49ad8603c47.pdf?index=true
    • http://japamitafixe.myartsonline.com/haier_hlp21n_belt.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014650.bin
48c7891b8dd9335bb606aa079a49a36963896c480d6bccb6211f3f6774022cda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14650 4960 bytes
font_01_sfnt_off00015720.bin
9d66d151c3fbeebbb6fbfcea70a64b863096eb1b45c2848ef8c2878ec130ef14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15720 11160 bytes

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