Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8473bb6625fecd2…

MALICIOUS

PDF

124.9 KB Created: 2022-05-30 21:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 5cf4a5d699b4935ded35929718bd2bc0 SHA-1: 2eaa28261c711bd8c18eebeb7a21277f9965c903 SHA-256: f8473bb6625fecd2e1a727b1942787a53842bc1c0875f33cdef36fbcf9d4e4c1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, which is likely a lure for users to download a secondary payload. The PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://colod.co.za/YmrXLWy8?keyword=stokes%20theorem%20in%20hindi%20pdf%20free%20online%20game
    • http://molenat-energies.fr/molenat.com/images/editor/file/gofaberaxabaloje.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/10800513359.pdf
    • https://music-group-store.com/upload/files/45987717813.pdf
    • http://ingenermarket.ru/userfiles/sulamumegaz.pdf
    • http://pappteam.hu/userfiles/file/62754607833.pdf
    • http://clubmaniacr.com/campannas/file/wijavelogujubomufufoze.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/a3fd65a1b5e12eee3c3e73f9c67b08c7/detutijokixojufogugo.pdf
    • http://samnakthodrahassob.com/userfiles/file/75104167831.pdf
    • http://dnepropress.net/files/file/xogusuvofewiliwi.pdf
    • https://leganordavigliana.it/uploads/file/vasefolazime.pdf
    • http://cleangroupbd.com/ck/upload/files/jevitepotabadozeponinuz.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1621af677b1747---suxomopapusifuxuvuburi.pdf
    • https://tagebukolili.weebly.com/uploads/1/3/0/7/130776523/dikanula_lizusowufidelof.pdf
    • http://kpdb.org/userfiles/files/sosimikelejulizi.pdf
    • https://coachhouse.info/assets/file/zowebufolisusage.pdf
    • http://gimhaejazz.com/fckeditor/userfiles/image/tebef.pdf
    • http://poliinc.com/upload/files/6172097768.pdf
    • http://jcon-aps.dk/userfiles/file/51465868912.pdf
    • http://revtechnik.cz/userfiles/file/livumo.pdf
    • https://www.hothousejazz.com/upload/files/gejixidigupenilil.pdf
    • http://yogaschoolofkerala.com/photos/editor/files/47097379127.pdf
    • http://kleinschadenexperte.de/userfiles/file/xenirajepunap.pdf
    • https://serukerikexukut.weebly.com/uploads/1/3/4/8/134887074/nowidupoweko-zojupojudatip-kodikuzigisuge.pdf
    • http://snft.ro/media/file/roxumasisa.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018419.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18419 16792 bytes
font_01_sfnt_off00019c30.bin
33cd9146cef6fa8d1c9ff3a261d4e2a12f8a652265e51886683b2f4149957e4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C30 11112 bytes
font_02_sfnt_off0001b5b0.bin
3c1accae580872904068bb80627dffe2ba2e57d2ab3c284b4ec6c1c837997195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5B0 18600 bytes

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