Malicious PDF — malware analysis report

Static analysis result for SHA-256 446a2e4663c738f2…

MALICIOUS

PDF

95.0 KB Created: 2021-03-09 13:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 120a81e59574dcef963bc08b04f2e424 SHA-1: 5768e119ec28f3c51d22d9be4c513975be40000d SHA-256: 446a2e4663c738f2f46282406f9cb4f70ba2753d3461a58850a7882b34492a8e
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm and hosts external URIs on disposable domains, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites like https://lozipotod.ru/award?keyword=hey+jude+partitura+sax+alto+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://lozipotod.ru/award?keyword=hey+jude+partitura+sax+alto+pdf PDF link annotation
    • http://mujoxoluvisukid.getenjoyment.net/42210106467.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/vias_de_administracion_de_medicamentos_para_nios.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/79862720682.pdfIn PDF document text
    • https://cdn.sqhk.co/lojeliju/jje5HIU/digi_top_up_code_hack.pdfIn PDF document text
    • https://tojipojewusaw.weebly.com/uploads/1/3/0/8/130814735/fusosowasukofu.pdfIn PDF document text
    • http://bapulesaj.mygamesonline.org/belajar_adobe_photoshop_cs3_untuk_pemula.pdfIn PDF document text
    • https://dikijezirepa.weebly.com/uploads/1/3/2/8/132815872/6510121.pdfIn PDF document text
    • https://dowanudamedi.weebly.com/uploads/1/3/1/3/131398164/2877956b6.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/h5ghahd/t_mobile_near_me_deals.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/ajhgf2e/noguxovomodez.pdfIn PDF document text
    • https://xodukibefapox.weebly.com/uploads/1/3/0/8/130873769/88b6c72e29eac6b.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/d0ighjj/6501379981.pdfIn PDF document text
    • http://ninijefaligogi.mygamesonline.org/55363709626.pdfIn PDF document text
    • https://cdn.sqhk.co/jitolado/heScVjg/best_free_brain_training_app_ios.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/what_is_keal_forged_in_fire.pdfIn PDF document text
    • https://mizemajawoxulu.weebly.com/uploads/1/3/1/4/131437858/goxovarop_dokoj_xotidivetuzizaf.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
    • https://uploads.strikinglycdn.com/files/dc19a92e-19cf-4ca5-98f3-80ed579c6635/kibuletonemojomozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/384b3cb3-b817-44b5-b304-27471ddd01d2/37882664117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4dbbad-60ec-4a87-9d08-1790326970e4/why_is_my_fios_box_blinking.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/piano_sheet_music_easy_free_popular_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dcb8598-6a35-49c5-8242-36a487dcffb3/how_to_do_spss_descriptive_statistics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/933968da-fdc9-4e75-b99b-b31deabec698/sims_3_expansion_packs_steam_to_origin.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/51423167549.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/whats_faster_than_hypersonic.pdfIn PDF document text
    • http://pekowob.onlinewebshop.net/queen_s_gambit_exchange_variation.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/72799921469.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/tubowakiropidodeni.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 5020 bytes
SHA-256: 404b593e8f61c31b290f8b718c4661502d95813e7b9764ea005980a8a4822a7c
font_01_sfnt_off000113b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B2 17088 bytes
SHA-256: 454f49d689d83c41ecb8b1e8586811ebb776bb6471e6d2b5e450e31280e62fe1
font_02_sfnt_off000149f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149F7 16292 bytes
SHA-256: 0ce16a8d2927eb9f33ee1825d8336bb272d70ffe4f4f0efd3bc55b076ce7ce9d
font_03_sfnt_off00015f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F9F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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