Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68ed4345ad0b57e…

MALICIOUS

PDF

115.9 KB Created: 2021-03-27 11:26:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddfcfcc8dd2ab087c5f975f3f63ab7dd SHA-1: 180bfead369e4855768cdc4371a28e56623bf61f SHA-256: b68ed4345ad0b57e5fc4422974a85abee48482fbf2fba73407689fafb5b6837b
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/award?keyword=english+to+korean+alphabet+chart+pdf
    • http://cosmicgig.com/31496913072uh2ic.pdf
    • https://cdn.sqhk.co/lewovazu/c6y1hi3/roblox_zombie_simulator_codes_wiki.pdf
    • http://jobs-ingenieur.best/margaritaville_bali_frozen_concoction_maker_recipesanfku.pdf
    • http://ighelperscenter.com/zufoxazedipibilanipozag1fx7.pdf
    • https://cdn.sqhk.co/zazerejaxu/oihidif/2012_chrysler_300_srt8_performance_upgrades.pdf
    • https://muwikilakejo.weebly.com/uploads/1/3/4/5/134519857/a386dc49.pdf
    • https://banabujoro.weebly.com/uploads/1/3/0/7/130776007/7728808.pdf
    • https://cdn.sqhk.co/xemugugafot/yFXphiy/basketball_easy_shooting_drills.pdf
    • http://wosutopanoba.mygamesonline.org/boolean_search_terms.pdf
    • http://support-copyrighthelpservice-about.com/what_is_a_360_degree_leadership_assessment89xh3.pdf
    • https://kutijodokijo.weebly.com/uploads/1/3/4/7/134706590/5793090.pdf
    • https://cdn.sqhk.co/gikazijegut/gcaiggg/unblock_me_premium_apk_free_download.pdf
    • https://cdn.sqhk.co/tojofelekob/Lh6iaJi/94628909502.pdf
    • https://cdn.sqhk.co/jazumagefo/jbZUYhj/automatic_bing_wallpaper_android.pdf
    • https://cdn.sqhk.co/fabetojowuje/Xidh4jf/absorption_definition_medical_terms.pdf
    • http://vosajizegek.mypressonline.com/arduino_c_language_reference.pdf
    • https://gekofixesijivex.weebly.com/uploads/1/3/5/9/135961820/risoxajob-jekoxozo-lisekowadepa-tekijov.pdf
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/zejirovimibole-lazilebim-mikiforajegu-mabixa.pdf
    • https://cdn.sqhk.co/novoganug/hFifoic/mawisuvoboli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://romofimor.onlinewebshop.net/88305869779.pdf
    • http://pekamidakoj.atwebpages.com/calendario_serie_a_18_19_sky.pdf
    • http://lutepotazor.onlinewebshop.net/8764743750.pdf
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_52c5cbc576d74e62853ecbd254f55b1d.pdf?index=true
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_815de0b387e14672b2f52e744d307264.pdf?index=true
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_7f6b693014594a59ae142d8787cb69c9.pdf?index=true
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_7109c15efa4d4827a6031dbbd58576fd.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014d2b.bin
42a50abf6cc874b907ce9aaeffbd45762a449803d3593e6dae21841b3d152416		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D2B 20668 bytes
font_01_sfnt_off00018a0c.bin
68395a0b45903ec5f1e1faa8303782465e7512ff6071da452406ea6dbc509465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18A0C 5580 bytes
font_02_sfnt_off00019cfc.bin
89c9000925ba65577cb1d949ec592fd67c6999e1af1743c54e9e215c42a63252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19CFC 10788 bytes

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