Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9980f3be8461fb…

MALICIOUS

PDF

80.3 KB Created: 2021-03-08 15:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b916d9bce33686134a36f3b7a34a8f6 SHA-1: 2bde4a45fea23efce8346920d64ec0aa63c7f311 SHA-256: 5f9980f3be8461fb43543f667345b28c043b6f91e3478218ceee53b20f5cbfe0
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file. While no scripts were explicitly extracted, the presence of embedded URLs within a PDF, coupled with high-confidence detections, suggests this document is designed to lead the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/aws?utm_term=monitor+card%25C3%25ADaco+garmin+forerunner+35
    • https://cdn.sqhk.co/zoboxoba/hhheeFB/pandora_music_tv_commercial.pdf
    • https://dupukixulin.weebly.com/uploads/1/3/2/6/132681516/5619752.pdf
    • http://tujemet.scienceontheweb.net/peruvian_gamefowl_fighting_style.pdf
    • https://cdn.sqhk.co/tunuviju/diibGfK/dune_book_3.pdf
    • https://cdn.sqhk.co/novozefox/c4OQIww/65909835854.pdf
    • http://talajifit.mywebcommunity.org/huckleberry_finn_quotes_about_the_mississippi_river.pdf
    • http://xejopegig.mypressonline.com/bissell_little_green_machine_replacement_hose.pdf
    • http://tonedomopoja.scienceontheweb.net/krups_nespresso_coffee_machine_spare_parts.pdf
    • https://notagudoda.weebly.com/uploads/1/3/0/7/130776089/802a466cef3e48b.pdf
    • http://tuwukadinem.mygamesonline.org/bibibusitigifamigu.pdf
    • http://copyrightnotice-ig.com/sujukagoruduzavedukuxjdmr.pdf
    • http://madewithsunshine.com/21807396416gmbtj.pdf
    • https://cdn.sqhk.co/nadokikado/5gChhjj/98625492080.pdf
    • http://priz24.site/85361178263lz097.pdf
    • https://cdn.sqhk.co/rozamulev/fhcsBOG/candy_crush_saga_level_5326.pdf
    • http://pifofobexaxel.mypressonline.com/46680474287.pdf
    • https://xiwabuba.weebly.com/uploads/1/3/0/8/130813639/bf4a733a9075.pdf
    • http://helper-badges.com/miwewadubifolitowgkhxr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://petojijoxura.onlinewebshop.net/metal_gear_solid_1_pc_cheats.pdf
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_57b2d782571d467e930a2ed6a891736e.pdf?index=true
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_ec16bff4cf3644f2b43a5c68dba481f5.pdf?index=true
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_ff302cb6f96f49e992534ad41e10c960.pdf?index=true
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_6feaaefd6d424039aec1ef8c74173077.pdf?index=true
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_e7e3017e546648409b0fa3cbaf3f7cc8.pdf?index=true
    • http://nufiwimuzobo.onlinewebshop.net/64820655589.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_off0000f596.bin
7a51d2d06e7a4656ca6ed12420c4502762331697b7ab5a3416344ce430991a96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF596 5480 bytes
font_01_sfnt_off00010841.bin
d1549326574f4be2b44316e3dbeb4861c69b4c6920fb75f1362dc936225c2306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10841 12684 bytes

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