Malicious PDF — malware analysis report

Static analysis result for SHA-256 caccdae08cb21f64…

MALICIOUS

PDF

82.6 KB Created: 2021-04-10 15:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27c4febfd7b8d74240c61d80e1cbb8c2 SHA-1: 6c7ef47a08bc1572a25050862edff2dc3676cbf7 SHA-256: caccdae08cb21f6475a4ee93a9b00b33b0a9c8ff821e5df489fe0041461e0c0b
136 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating an advance-fee scam lure. The embedded URL `https://pelibifir.ru/strik?utm_term=focusrite+scarlett+solo+2nd+gen` is likely part of the scam, aiming to redirect the user to a fraudulent site. No scripts were extracted, but the PDF structure and heuristics strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pelibifir.ru/strik?utm_term=focusrite+scarlett+solo+2nd+gen
    • https://cdn-cms.f-static.net/uploads/4479254/normal_6037f7fc87827.pdf
    • https://static.s123-cdn-static.com/uploads/4470405/normal_5fccfcbbb054c.pdf
    • https://cdn-cms.f-static.net/uploads/4385437/normal_60218ced64602.pdf
    • https://static.s123-cdn-static.com/uploads/4369520/normal_5fcf0915953a3.pdf
    • http://ketenimolupev.sportsontheweb.net/xoboworuvidus.pdf
    • https://cdn-cms.f-static.net/uploads/4444377/normal_5fe64aa7a8c93.pdf
    • http://palumurawisan.22web.org/brushed_cotton_sheets_and_pillowcases.pdf
    • http://dikagowoxi.sportsontheweb.net/gaxosipebazijenesazumitot.pdf
    • http://lunatan.medianewsonline.com/vicks_warm_steam_vaporizer_humidifier_with_night_light_-_1.5gal.pdf
    • https://cdn-cms.f-static.net/uploads/4450421/normal_60184453e0981.pdf
    • http://korogesubelokut.mypressonline.com/genetically_modified_crops_and_food_security.pdf
    • http://sunazeremitiwu.mypressonline.com/behavioural_economics_and_finance.pdf
    • https://cdn-cms.f-static.net/uploads/4385634/normal_6021bd8e68f1d.pdf
    • https://cdn-cms.f-static.net/uploads/4484610/normal_604d1da59d7b7.pdf
    • http://nebofimanigi.sportsontheweb.net/how_do_i_fix_the_pick_motor_stalled_on_my_hp_8600.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://maputixesikowi.epizy.com/ruminant_animals_production.pdf
    • http://weponigonimogo.myartsonline.com/bobukosu.pdf
    • http://jogisav.epizy.com/englisch_brief_schreiben_bung.pdf
    • http://pezamax.myartsonline.com/dermatitis_seborreica_y_alopecia.pdf
    • http://piwakitidi.onlinewebshop.net/management_information_systems_managing_the_digital_firm_15th_edition_ebook.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_off000106f4.bin
3f8aac6500d5c770d9a441775a1cc6ff561908b5dc66789c74e2de9cfe3d25f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106F4 5196 bytes
font_01_sfnt_off000118b1.bin
e9f40fb76054939fc2e8f6c180ded1cf514e09f3b209f5de5bf00393a7644129		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118B1 10688 bytes

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