Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3f9e8a8ee325d4…

MALICIOUS

PDF

78.9 KB Created: 2021-04-05 20:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 097b572db5c26414ad55f4d755681880 SHA-1: 5e9d1d73c0b9104d7ed5f683602c89c64fb5968a SHA-256: 2e3f9e8a8ee325d494d284afe58af1982eeaae56654b63d90c541ee437dba74d
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://golowaki.ru/award?keyword=air+pollution+control+vtu+notes+pdf', suggesting a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate it's designed to redirect users to potentially harmful content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/award?keyword=air+pollution+control+vtu+notes+pdf
    • https://cdn.sqhk.co/xibetevoxaj/pifiad8/90957111711.pdf
    • https://cdn.sqhk.co/fiziroluj/ihhdVih/club_l_clothing_size_guide.pdf
    • http://enots.space/144897549443zgwx.pdf
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fcb36f05207b.pdf
    • https://cdn-cms.f-static.net/uploads/4460447/normal_60540fcfbc6fe.pdf
    • https://cdn.sqhk.co/bupabumo/SNVheSw/26629892663.pdf
    • http://csxmoney.info/42935454202h3nef.pdf
    • http://pimamuxup.22web.org/what_is_classroom_management_strategies.pdf
    • https://cdn.sqhk.co/geruxibab/cjdifpJ/keromojumimim.pdf
    • https://cdn-cms.f-static.net/uploads/4417530/normal_6024b732c4eaf.pdf
    • https://cdn.sqhk.co/dofexoxev/fjjijRA/zejijosimudajukezup.pdf
    • https://cdn-cms.f-static.net/uploads/4378164/normal_602895d3bdf0e.pdf
    • http://tiketaxi.iblogger.org/fetivima.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_bba6537dc937477f8e946c39f603801e.pdf?index=true
    • http://vemewef.rf.gd/gelawetoluzomiwefasetomen.pdf
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_ce4212d5491a4576a3c0fb103bf4a844.pdf?index=true
    • http://xinadapobeloj.rf.gd/andreas_moritz_liver_and_gallbladder_miracle_cleanse.pdf
    • http://valogaberel.rf.gd/axure_rp_full.pdf
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_7e6c34db17294b89806fa39489f740d7.pdf?index=true
    • http://lojunutuzis.rf.gd/emmanuel_goldstein_book_1984.pdf
    • https://807eaacf-9fb6-4e16-bcb8-061395d1d132.filesusr.com/ugd/a3ef2e_27c42b03608d4c2d90c9d8bbfa1819f9.pdf?index=true
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_c54256e235084232a0280e4ee886bd08.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d4.bin
f17ce84a3e0375d050172a012e23fc3d3418b20c9458fb73c0967216df107ff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D4 4868 bytes
font_01_sfnt_off0000f96f.bin
7ad2dbdddb05467ab21a76317d55f9d78e3178d40c3f9e17d123d02087ff5fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF96F 11372 bytes
font_02_sfnt_off00012033.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12033 4324 bytes

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