Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f59ca76a3d8e657…

MALICIOUS

PDF

86.6 KB Created: 2021-07-01 19:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d921e03918d780790e0452b52345714 SHA-1: 130f0843d1212520a14d0bd8dcc1a2e39c36647d SHA-256: 1f59ca76a3d8e657aceaacd757dc698a2968b9d6cec7e731c484b1cb69df7d84
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. The presence of an embedded URI pointing to 'coretry.ru' with a query parameter suggesting a lure for 'free riot points' strongly indicates a phishing attempt. The heuristic 'SE_URGENCY_LURE' further supports this by detecting urgency language within the document, aiming to prompt immediate user interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://coretry.ru/uplcv?utm_term=get+free+riot+points
    • https://chetanaus.org/bheru/uploadfiles/file/83591399791.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/2d5c0f53c3fee2ce328623b503bac4d8/zukagipokuvalozozatufebeb.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/ba68ec4cdc9bdbe9161f56ef35feef67/rosira.pdf
    • https://btegypt.com/file/dujebajupurigi.pdf
    • https://broadcasthub.com/ci/userfiles/files/38439428349.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/2cc565814a12d7733bea833f5f53c5b7/jaferuzemojalowifizejurox.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/ff216e10cf708993bfa5b6f9ea30bc53/milazudamurixilonin.pdf
    • https://musikkursus.dk/userfiles/file/pesuvurinelagipebofego.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c88571b12d---xurisa.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a980ecbb95f---68144870088.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/pssm7k0ckpqubi8ur3chkuntfr/panit.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc4c62e5a2---55051994076.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/92kv23ideiu2icuq0urqhd8005/nuzibasosorevonawelaxidu.pdf
    • https://lawyerupsmart.com/tempimg/file/xufemigivov.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f88f9d71fa---36605982635.pdf
    • https://bazab.ru/ckfinder/userfiles/files/kuwijuv.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/8pn8avmqfr4a1nm2970a3ipoj6/21051341324.pdf
    • http://otoozevran.com/resimler/files/13244020283.pdf
    • https://tectrongim.com/uploads/files/31860929274.pdf
    • http://bet-balance.com/userfiles/file/2112917213.pdf
    • https://isleo.com/i_photos/file/kapuzupopuwibanurapakolar.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911afe1c7b1---tupotowaxawujuda.pdf
    • http://emke.hu/uploads/ckfinder/userfiles/files/87831076160.pdf
    • http://flatadministration.com/uploades/fckeditorfile/59950058097.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090f4bfcfdaf---vewitakewovumok.pdf
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/35773442948.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/vq5i9291nto6khk7o50r61qs1q/fakomowixofexi.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://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_off0000f09c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF09C 16792 bytes
font_01_sfnt_off000108b3.bin
f530c0dd8feb99d65cdeb1c9361e9ed27b8a0b168b137f3c07d984c9633a704b
pdf-font-stream PDF embedded font (sfnt) at offset 0x108B3 10184 bytes
font_02_sfnt_off00011fa3.bin
071c9cb4e6f0c34a19b0f09e16028e7139deb17820eee8e8befb6af80135815e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA3 17380 bytes