Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc372afb0884943…

MALICIOUS

PDF

74.2 KB Created: 2021-03-29 21:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b16f9d7549ccf801605c757c44471eb0 SHA-1: 6d14391d587428317ab8c3dda51bca87431c8cb1 SHA-256: bdc372afb0884943cb9f520765e4b96aefae9a9c1c6b29341679fbda5ca1ad40
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to 'geometry chapter 12 resource book lesson 12.3 practice b answers', likely a lure to attract victims to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/wix?keyword=geometry+chapter+12+resource+book+lesson+12.3+practice+b+answers PDF link annotation
    • https://cdn.sqhk.co/kupejabel/jaibWib/sowuvomozujajuzotuxorev.pdfIn PDF document text
    • https://cdn.sqhk.co/wixadigizal/cGhf7hb/96830304073.pdfIn PDF document text
    • https://cdn.sqhk.co/zatugudaxaji/tAhfbG6/angular_2_material_templates_free.pdfIn PDF document text
    • http://rafale.store/sapo_y_sepo_un_ao_entero_cuento_completoxc7yh.pdfIn PDF document text
    • http://bimovixexena.scienceontheweb.net/brainwashing_the_science_of_thought_control.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/Njes1hf/rta_audio_analyzer_pro_1._5_apk.pdfIn PDF document text
    • http://dronextactical.xyz/how_do_i_reset_my_maytag_washernrzgz.pdfIn PDF document text
    • http://rifivejawix.22web.org/25740880935.pdfIn PDF document text
    • https://cdn.sqhk.co/fikalibumi/MqQkhbn/tuzifo.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/gastritis_cronica_tratamiento_nutricional.pdfIn PDF document text
    • http://opensalle.xyz/panasonic_th-42px75u_stand6m66p.pdfIn PDF document text
    • https://cdn.sqhk.co/sawapevodef/je7DjjP/bcpg_public_company_limited_annual_report.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/ijbhfii/grass_cutter_machine_price_flipkart.pdfIn PDF document text
    • https://cdn.sqhk.co/ledivure/evjbEgf/moy_6_the_virtual_pet_game.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/svensk_arabisk_lexikon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sumafalonedap.rf.gd/5488383228.pdfIn PDF document text
    • http://kamolep.epizy.com/marketing_plan_pepsi.pdfIn PDF document text
    • http://refowokewip.rf.gd/how_do_you_set_a_4_button_digital_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/64957092829.pdfIn PDF document text
    • http://godosuluto.myartsonline.com/39181725189.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/alight_verb_forms.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_off0000dd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD63 5984 bytes
SHA-256: b3a4ff4004dcb3ff1a847dd960cc9ce286529500e29feb296ee075fe429bffb0
font_01_sfnt_off0000f1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B2 11792 bytes
SHA-256: 4fcb79b45e864b4d9956be1fca664dc34972bcd0a5535e685fbf4d8431152914

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