Malicious PDF — malware analysis report

Static analysis result for SHA-256 379e84111e47f188…

MALICIOUS

PDF

84.3 KB Created: 2021-03-28 07:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22e662867b8a95da34b14a80238f49a8 SHA-1: e1eac24ae7fae4a4f5dbd6c10348f4927dd15ee5 SHA-256: 379e84111e47f188ecbb770f4cb2117ec034c4c6572db716ec6b68542de68a3c
136 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading a payload. Heuristics indicate it's a phishing lure and has been flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to 'calistenia ejercicios basicos pdf' and 'wkhtmltopdf', suggesting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gimoguvi.ru/award?keyword=calistenia+ejercicios+basicos+pdf
    • https://cdn.sqhk.co/xezufulozuwo/bD0gigj/out_there_edition_download.pdf
    • https://cdn.sqhk.co/gufojakig/2hfK6gf/ragdoll_games_battle_simulator.pdf
    • http://pogetukexuk.66ghz.com/hellraiser_puzzle_box_template.pdf
    • http://wajabub.22web.org/76365406344.pdf
    • https://cdn.sqhk.co/vazoguzo/RjggfYD/fruit_splash_2_game_free_download.pdf
    • http://begdas.space/zisibukogoxetogerilelc91y8.pdf
    • http://kavakedego.scienceontheweb.net/digefipapunuzididavedebur.pdf
    • http://vorgazme.com/how_to_troubleshoot_camera_on_google_meetgtmfn.pdf
    • http://wivevemeb.scienceontheweb.net/imam_al_ghazali_quotes.pdf
    • http://getplafond.xyz/62962299772gntms.pdf
    • http://smartcreditus.info/best_comfort_infrared_quartz_heaterhe1gi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f4a80ce2-0a24-44e2-aff7-13c87a434ee9.filesusr.com/ugd/ace063_0f56365053ef4b8584d1d36d3714571d.pdf?index=true
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_fad5ea89e7774ff694c518094705a0b5.pdf?index=true
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_44d82ea9cd104d3bb4d865f7302a252b.pdf?index=true
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_32040bf31afc48a9922b4f08daf43504.pdf?index=true
    • http://luturufotulak.rf.gd/secret_video_recorder_pro_android.pdf
    • http://lofomaseforuz.rf.gd/ratateziz.pdf
    • http://nesitobika.rf.gd/because_i_said_so_book.pdf
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_30523336554147398e01e399aab8e8a4.pdf?index=true
    • 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
    • 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_off0000f541.bin
5c6a2145179efd1cd74904b9535c1a5a1d82adb309e96405d2fc46a30fd46bb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF541 5268 bytes
font_01_sfnt_off00010734.bin
c785ff2c5ad1af4db44297df83eda8220210df82e9ba02e3e3243e5e40c40c14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10734 12128 bytes
font_02_sfnt_off00012e12.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E12 16312 bytes

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