Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedeb4e9c6affb82…

MALICIOUS

PDF

74.8 KB Created: 2021-03-25 08:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4fcd49fa8d71bea18f682dc75591906 SHA-1: 1622ab7ae6800356fd527a7685224b9e6dcfa45a SHA-256: fedeb4e9c6affb824b957a383eeab00aa6322eab9a75cb4541bd266965579a0e
136 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains suspicious links, including an invisible link to 'ig-supportcenter.xyz', which is a common tactic for phishing or malware distribution. The PDF's content, though heavily obfuscated, suggests a lure related to file conversion, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://botokaw.ru/award?keyword=convert+pdf+into+word+i+love+pdf
    • http://taforojujutusig.mygamesonline.org/xodolorakuwepob.pdf
    • http://topsol.xyz/8617300338xj4ad.pdf
    • http://shoop-fm.ru/60420566609nezh8.pdf
    • http://puvinizozibejir.mygamesonline.org/wanesuzegofuferin.pdf
    • http://ig-supportcenter.xyz/gipepuxqa77m.pdf
    • http://how2clever.com/65054694765eku6k.pdf
    • http://lorozetuwivu.medianewsonline.com/biozone_ib_biology_model_answers.pdf
    • http://wiwovurezibaso.getenjoyment.net/vedogifuguwaxubasip.pdf
    • http://argo-tourism.com/74109993363piu48.pdf
    • http://busimaderule.mywebcommunity.org/how_to_make_beer_at_home_step_by_step.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fa7a06ff-7822-424c-9456-a6a62eb4eb64/how_much_is_a_fuel_pump_for_a_2004_dodge_ram_1500.pdf
    • https://uploads.strikinglycdn.com/files/57f74182-612c-46f2-8335-c906c597762a/the_complete_tales_of_winnie_the_pooh_epub.pdf
    • https://uploads.strikinglycdn.com/files/9e4950c5-fec0-4d9c-a650-ba37e7a52288/which_country_exports_the_most_steel.pdf
    • http://vigexosav.myartsonline.com/pewemixetijokaxuxakuma.pdf
    • https://uploads.strikinglycdn.com/files/18434bde-a1ce-4e01-8d71-f7a4df929d0d/flir_one_pro_lt_android_usb-c.pdf
    • https://uploads.strikinglycdn.com/files/982e898b-38fd-4f1f-824e-ec41b517b5aa/what_is_person_centered_therapy_used_for.pdf
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_0c0ebd21c00041518f1eeaa6290a798f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cd1e0990-13ba-4e2f-8fb8-823c5f247668/xitenofavunalinogo.pdf
    • https://uploads.strikinglycdn.com/files/1ea2a762-231c-4434-bd15-37165c06ac58/modere_phase_1_menu_plan.pdf
    • https://c3e810f9-371e-40b9-9a0b-4695a496ec77.filesusr.com/ugd/2c7c49_c831567dd1d545d7907c049729947ec0.pdf?index=true
    • https://ee6e56e8-c390-49d2-810b-d4defef8b9c1.filesusr.com/ugd/eda187_6d578032abbd4756bbd44073623445a7.pdf?index=true
    • http://rawegutidum.onlinewebshop.net/calendario_escolar_cyl_2020.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_off0000e779.bin
a7f6e2c8c4140cad1689ffa995f5559436e3e5566284856da252ef8ed0b32921		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE779 4704 bytes
font_01_sfnt_off0000f79f.bin
49ecc95eb5dca9213c7b4453b2f3e9fb34df123625e5ac1f08d5098ae205484c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF79F 11244 bytes

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