Malicious PDF — malware analysis report

Static analysis result for SHA-256 592d2b8d1e81afbe…

MALICIOUS

PDF

79.6 KB Created: 2021-03-25 16:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bce3cf8a600d82f140727df9b445ec90 SHA-1: 9fe5d04e94be1c9289804e04b858c576017788fe SHA-256: 592d2b8d1e81afbe78f2080efc511140465f74c6927ace32dc0975e256dd1a23
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. The presence of an external URI and a heuristic for a visual download button suggests a phishing or social engineering attempt to trick the user into downloading a malicious payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/wix?keyword=ladybug+and+cat+noir+toys+videos
    • http://jiwapadenejeza.getenjoyment.net/16362805525.pdf
    • http://posadukik.getenjoyment.net/stairway_to_heaven_chords_beginner.pdf
    • http://luwogexejel.getenjoyment.net/rose_and_dimitri_last_sacrifice_fanfiction.pdf
    • http://maxobenasu.22web.org/wewav.pdf
    • http://foluzedezafaval.iblogger.org/31160440316.pdf
    • http://towufato.mywebcommunity.org/reliabilt_french_doors_installation_instructions.pdf
    • http://wusazododapir.iblogger.org/70345305204.pdf
    • http://xoxunanodu.22web.org/septic_shock_treatment_guidelines_2016.pdf
    • http://filebitikuj.iblogger.org/cutting_tools_materials.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gazitif/repezekuputuparut.pdf
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_2b8529647afb4a51aa6b534bbe49da36.pdf?index=true
    • https://s3.amazonaws.com/davawina/how_to_change_honeywell_thermostat_wifi.pdf
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_38bfebab305d443ab0f6a5181fd36257.pdf?index=true
    • https://0ddd2631-58c7-464c-86d0-a5d1d8121c04.filesusr.com/ugd/301b85_3c22c0ce18384711b8ea55ad5abfad7d.pdf?index=true
    • https://3abcc933-4059-444f-8e65-7077e95f005f.filesusr.com/ugd/44645f_9f4ce0e0ac344628bd8fb81dea2fa4f1.pdf?index=true
    • https://s3.amazonaws.com/sebunuzu/cyberflix_app_android.pdf
    • https://uploads.strikinglycdn.com/files/7715da4a-e08d-418f-be78-98279e248e4f/english_composition_3_ucla.pdf
    • http://wivufaw.epizy.com/asterix_als_gladiator.pdf
    • https://uploads.strikinglycdn.com/files/d3a9c8d4-8c66-4812-9741-9118564d80b9/toro_20016_manual.pdf
    • https://s3.amazonaws.com/xeponodij/mevofanavedidalugug.pdf
    • https://s3.amazonaws.com/jobavo/ubuntu_server_live_cd.pdf
    • http://gisipusizen.rf.gd/what_can_you_not_eat_on_an_anti_inflammatory_diet.pdf
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_293149a646f44cf7badcf941f06a18a9.pdf?index=true
    • http://jedejetitafabi.rf.gd/how_do_you_reset_a_chest_freezer.pdf
    • http://loturorilod.rf.gd/unire_file_i_love.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_off0000f753.bin
b8fe261402af2e7625a98834cf8c08d2e9ed7c50fbe98cf3099b27865f2ff115		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF753 5316 bytes
font_01_sfnt_off0001098b.bin
1f43fef025d821ac90b7f38e7eaf162137c8d2e60d883cbb06b4b37620e1491e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098B 10888 bytes

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