Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5d9a1dd1b870e7…

MALICIOUS

PDF

84.1 KB Created: 2021-02-05 15:14:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5e79f746a00aea21abcafc3286638c94 SHA-1: c3f1374a9f9e755c192f555261f77952c10059a2 SHA-256: ec5d9a1dd1b870e759fbc25565877da48d7c175b994d41a8dc714405d2a746cf
96 Risk Score

Malware Insights

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

The file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URL `https://jacksth.ru/wb?keyword=chopin%20aeolian%20harp%20pdf` suggests a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wb?keyword=chopin%20aeolian%20harp%20pdf PDF link annotation
    • https://cdn.sqhk.co/befozaxulot/hhzSjg2/frontline_commando_2_apk_mod_revdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404755/normal_5fdb1418a5c94.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/fwib68B/nasawaresabatasig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487419/normal_6010463516019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482618/normal_5feb31a7546aa.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/Xnjaidu/pagokoleve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482189/normal_5fef02c3c8eb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5fe8309183269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_60146ee295736.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuwajavi/cgc6agh/hockey_apple_watch_faces_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5fd7903733458.pdfIn PDF document text
    • https://cdn.sqhk.co/wejawujagi/ghiiijq/20528200376.pdfIn PDF document text
    • https://cdn.sqhk.co/konanetufuda/jahjoii/sunexawatubatinekexiga.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/megelugik/bilan_orthographe_ce2.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/chess_tactics_pro_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/jumble_crossword_puzzle_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/xoligaxosupuboka.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/sadokoraxebajegurisekejar.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/u_dictionary_apk_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/microsoft_access_for_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/xefafanewun.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f70d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF70D 12584 bytes
SHA-256: 1ce7799756a8489a73d0764f71eab3d647f715afbde78ff924d5b30323a62768
font_00_sfnt_off0000e6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A0 4856 bytes
SHA-256: 3c743b220199c22d0f7b666f3ff4c537cc3944f6434f93b64fdbaa1002b82d54
font_02_sfnt_off00011ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC0 11272 bytes
SHA-256: e629ee6f68bfcac5261f92e55ed83448eb37b4da277533bae6fee0092b718133

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