Malicious PDF — malware analysis report

Static analysis result for SHA-256 695aceb8157d478c…

MALICIOUS

PDF

105.6 KB Created: 2021-03-20 21:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4076f7dc6a4743d7535c9c22bda51ef SHA-1: d419548ff7faaebda432bbbd486c497874607eb7 SHA-256: 695aceb8157d478cd3e66c64f24f1690e7918a5fdd0c79e9b68cbe78a6dc9d1c
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains an embedded URI pointing to a suspicious domain, and heuristics indicate the presence of a visual download button, suggesting a phishing or social engineering lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=biology+grade+11+textbook+nelson+pdf
    • http://vemasujananexu.22web.org/explore_learning_collision_theory_gizmo_answers.pdf
    • http://luxomozuk.mypressonline.com/faketawinowinikoseb.pdf
    • http://gagitevanonuti.mywebcommunity.org/mexelosikaletilodim.pdf
    • http://melowew.scienceontheweb.net/uefa_champions_league_calendar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sasududazo.epizy.com/galvanized_steel_sheet_malaysia.pdf
    • https://s3.amazonaws.com/zobuwubedak/nofasex.pdf
    • https://uploads.strikinglycdn.com/files/2e0375fc-6ef1-438b-9d9d-792da23437e4/1919040554.pdf
    • https://uploads.strikinglycdn.com/files/1f98d11e-da54-4b23-a10c-afee06c6365a/dokeke.pdf
    • http://xumugipetoje.epizy.com/carpal_tunnel_syndrome_adalah.pdf
    • https://s3.amazonaws.com/satuja/46990970125.pdf
    • https://uploads.strikinglycdn.com/files/9bd9bfc7-7ad6-4c37-8beb-8411f9bf2051/pokeboroxuguzaxonaxulan.pdf
    • https://s3.amazonaws.com/fipijife/wedigadebagelib.pdf
    • https://uploads.strikinglycdn.com/files/b04f8386-dd81-4f9d-8819-9e76f65b8aff/how_to_start_troy_bilt_storm_2410.pdf
    • https://s3.amazonaws.com/wixanarer/kung_fu_choy_lee_fut_forms.pdf
    • http://gaditerigasut.rf.gd/40114171784.pdf
    • http://puzexexaniledow.epizy.com/rugopenuxezade.pdf
    • https://s3.amazonaws.com/mefovu/reason_for_leaving_your_formal_job.pdf
    • https://uploads.strikinglycdn.com/files/24b252ff-fda5-4246-9688-40566a31bf51/3508507824.pdf
    • http://dorofudi.epizy.com/pdf_text_editing_software_free_online.pdf
    • http://tasowotata.epizy.com/minecraft_0._15_0_apk_build_2.pdf
    • http://mosakokomu.epizy.com/xaburigebetida.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_off00015e6a.bin
2845c3c8c4ad785c9713392715951932a9447e38edc8283324e5d49840f499ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6A 5684 bytes
font_01_sfnt_off000171e6.bin
50e53a433cd8d5eecf32d6ef315e0ce2e97644e63b514a50b3aa3e163641c95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171E6 11372 bytes

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