Malicious PDF — malware analysis report

Static analysis result for SHA-256 b864ec5d09ea63b2…

MALICIOUS

PDF

80.9 KB Created: 2021-05-02 08:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 200f156a4bea4cea4ede5964a9c7a7e9 SHA-1: 0cbabd98ec4f77aa05a5b464cc0031058bc8f800 SHA-256: b864ec5d09ea63b2d423882e220dfc709e29ed9b2ba6f11aaa657818ac0b4fe8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://resalured.ru/strik?utm_term=organization+structure+ppt+template+free PDF link annotation
    • http://redirerer.medianewsonline.com/diseo_generativo_asterios_agkathidis.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/abattoir_equipment.pdfIn PDF document text
    • https://lesezisuwo.weebly.com/uploads/1/3/4/1/134109364/radenevoreb-zefov.pdfIn PDF document text
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/3967943.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/pasaxolowovemafi.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/how_much_is_steve_jobs_net_worth.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/character_change_graphic_organizer.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
    • http://dexizijisub.atwebpages.com/bhagavad_gita_simplified_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a87a6152-5f6c-449f-856e-2dd1677ec770/el_nombre_de_la_rosa_pelicula_completa_latino.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/have_boundaries_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/fidinanikagomo.pdfIn PDF document text
    • http://koriwironawuva.myartsonline.com/avicenne_energy_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/penny_stock_trading_quickstart_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/8574424637.pdfIn PDF document text
    • http://tosabukevosubar.myartsonline.com/fifas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d9f946-461f-43d1-b5d7-c70ef0b6be52/titeto.pdfIn PDF document text
    • http://baxewape.myartsonline.com/angielski_w_tumaczeniach_sownictwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d32d43-ce12-46ff-b121-a8ab1c7d6f68/how_to_hook_up_spectrum_cable_box_to_tv_without_hdmi.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/nuxowanuxutexo.pdfIn PDF document text
    • http://bopubedoru.myartsonline.com/carb_cycling_meal_plan_for_fat_loss_female.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/bengali_to_english_speaking.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/2004_kawasaki_vulcan_nomad_1500_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c86c71-9dc9-434d-a4e2-495c5bc9f4cd/wapudonevenit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C6 5292 bytes
SHA-256: a5db558d70b3ba87235799440cbeeb4eee13ea7df9645f5db7365807cca67dab
font_01_sfnt_off000105b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 9876 bytes
SHA-256: 38eda3cf1de1ce41d99f158e5b0c7d33a347e9d329af9007e167482f4528d0c4
font_02_sfnt_off00012782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12782 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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