Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0f244af6fba346…

MALICIOUS

PDF

86.5 KB Created: 2021-04-25 16:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9465af650a891f2e3caaef50f3897fc SHA-1: 7bde273e7feb08110f9c0d1ef2277d97d9a046ae SHA-256: ae0f244af6fba346e5f83f1043d2ce228df4bf5207ead51033e9f11db5d6ac07
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, particularly `https://nipisod.ru/strik?utm_term=d-link+dir-825+ac+1200+wi-fi+dual-band+gigabit`, suggests the document is part of a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are commonly used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=d-link+dir-825+ac+1200+wi-fi+dual-band+gigabit
    • https://static.s123-cdn-static.com/uploads/4450884/normal_600067ec36eb4.pdf
    • http://fajujefa.getenjoyment.net/womijuxubotaler.pdf
    • http://hellesypakk.online/10742265609qjydt.pdf
    • https://cdn-cms.f-static.net/uploads/4409123/normal_5fe9c7e0b839c.pdf
    • http://life-news.tech/polar_vantage_m_manual88d1p.pdf
    • https://cdn-cms.f-static.net/uploads/4464539/normal_602ee4702d6ce.pdf
    • http://rujibobisurixu.iblogger.org/oxford_english_russian_dictionary.pdf
    • http://deladinabixek.sportsontheweb.net/mejigedamuwidekejapi.pdf
    • http://dexuposi.sportsontheweb.net/cementing_oil_and_gas.pdf
    • http://chempion.coffee/armello_gameplay_trailerxqrar.pdf
    • http://goshop32.site/tonatu1i980.pdf
    • https://cdn-cms.f-static.net/uploads/4421466/normal_603043a5d9e0f.pdf
    • http://koolmaxt.online/76874890514yc9vj.pdf
    • http://nnorm-id.com/mipadejiwegawixuvovuwxyp9.pdf
    • http://fodefon.getenjoyment.net/mexufamob.pdf
    • http://tosety.xyz/dihybrid_punnett_square_practice_problems_with_answersizbp8.pdf
    • https://cdn-cms.f-static.net/uploads/4423452/normal_5fd7d76e5d5a3.pdf
    • http://normaa-id.com/1041944947kiaxb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://rewuwuja.onlinewebshop.net/calea_standards_for_public_safety_communications.pdf
    • https://83bd47e3-138d-48d8-8d00-514fe13b91b0.filesusr.com/ugd/c87a2f_52cbb80056e84cdabd568e8ac353e62e.pdf?index=true
    • http://firotiz.epizy.com/runawowajutimefogezato.pdf
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_1f8abb8e382647818a207914f6d6b370.pdf?index=true
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_5892293a242c4aad9e8cead01a49c951.pdf?index=true
    • http://dakelajipupak.epizy.com/calling_sehmat_book_download_free.pdf
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_7adb088d7dff4109912cb6a75ab20aeb.pdf?index=true
    • http://lulevewutowa.epizy.com/xukuta.pdf
    • http://fudowoxalukiki.rf.gd/10305090660.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100cc.bin
56834d2400abcbbd9a4b6e7c5d10ed37a69690105b5d5f00da0bf8206fb97f66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100CC 5984 bytes
font_01_sfnt_off00011557.bin
30130e6938256e4abd2149a29861fc6f98a59a5e186d6a9ab87dfb871230c8e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11557 6500 bytes
font_02_sfnt_off000126a8.bin
142983d5b3b91fbe1f8a6af2a07ef8df70fee18d43e72514cf24c2848bccda51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126A8 10956 bytes

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