Malicious PDF — malware analysis report

Static analysis result for SHA-256 f95ead1285af4eb6…

MALICIOUS

PDF

81.0 KB Created: 2021-04-01 09:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f74e397529ebeef4ce0c7299f4b300f SHA-1: d5604460bd745b9c6ab586f28c377e0812506f0a SHA-256: f95ead1285af4eb6eff133185ade0741076f2a39306133ed7a5773903422f906
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. The presence of a visual download button lure suggests an attempt to trick the user into downloading a secondary payload. Several external URLs were extracted, indicating potential download sources for this payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=createspace+templates+indesign
    • http://nalatakojuzali.iblogger.org/81452120840.pdf
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/2bb0f0ab20407.pdf
    • https://cdn.sqhk.co/wolitobutak/RhepRcO/weremafedijununudiv.pdf
    • https://togutugu.weebly.com/uploads/1/3/4/6/134617883/1533977.pdf
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/8b89ea3886ccf5.pdf
    • https://cdn.sqhk.co/fabokofe/gdChahh/golf_clash_golden_club_wind_chart.pdf
    • http://werojati.getenjoyment.net/21315525125.pdf
    • https://pabimoju.weebly.com/uploads/1/3/3/9/133997489/texerubupavepazog.pdf
    • https://cdn.sqhk.co/fofasafiwi/9gfGgjk/xowufofug.pdf
    • https://latapelubatute.weebly.com/uploads/1/3/5/9/135960370/edaa3f5998175.pdf
    • https://cdn.sqhk.co/ripalufix/hbkifjc/ducks_vs_beavers_civil_war_2019.pdf
    • http://nexofozupugasi.mywebcommunity.org/nelson_textbook_of_pediatrics_online.pdf
    • https://cdn.sqhk.co/zidulibu/5jhspiJ/bizikeviwibolorax.pdf
    • http://tapagigozi.medianewsonline.com/robotic_hand_design.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/peveziwoguxuzam/94290833552.pdf
    • http://sidalep.rf.gd/70840224215.pdf
    • http://nijetazum.epizy.com/vekololorofitawapad.pdf
    • http://zokivobadid.rf.gd/3_d_shapes_worksheets_for_year_1.pdf
    • http://kepewitibafef.myartsonline.com/funcion_de_la_hormona_antidiuretica.pdf
    • https://s3.amazonaws.com/jagux/kufofalidojemogozup.pdf
    • http://nerepigov.rf.gd/xawuji.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f198.bin
4a6240e5e7e9d0f1efdc67e2a8e3d9bad018eeb7c66f33b8429ac2dedd417647		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 5096 bytes
font_01_sfnt_off000102cf.bin
a6bf0425cc7c2d8bfc0a7679a06ac08a65fe688d12ace95bf70b62e3c2bf1fab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102CF 10872 bytes
font_02_sfnt_off000127f6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127F6 4324 bytes

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