Malicious PDF — malware analysis report

Static analysis result for SHA-256 479a37bcc6f93d80…

MALICIOUS

PDF

76.3 KB Created: 2021-03-22 15:05:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ce336b96453b248e8415fc651d79871 SHA-1: 5981744701db9e31bbcd3f69fb01a74d494368c7 SHA-256: 479a37bcc6f93d80f7f291c9d43271ac3f1862f38db077cd22aeecb3f63a32fd
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are disguised as legitimate documents, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest it is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6712

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://resalured.ru/award?keyword=canara+bank+mobile+registration+form+pdf
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/xapivasopu_dudivukifuzadaw_tudaz.pdf
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/5859686.pdf
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5fe823905dc28.pdf
    • http://remont-kholodilnikov.website/anime_avatar_face_maker_apkdcqg4.pdf
    • https://static.s123-cdn-static.com/uploads/4449783/normal_6005d95538648.pdf
    • http://clubstore.info/maximum_allowable_back_pressure_for_pilot_operated_relief_valvep7zjd.pdf
    • https://static.s123-cdn-static.com/uploads/4446782/normal_5ffb50b34f679.pdf
    • http://nakidki-alkantara.xyz/imperialism_in_africa_answer_key36t91.pdf
    • http://dirupomavi.iblogger.org/integration_formulas_for_class_12_download.pdf
    • http://normal-id.com/92104380641svacc.pdf
    • http://eduha.online/rirajutogizafofufukarebedu5hv9.pdf
    • https://namekabesomi.weebly.com/uploads/1/3/4/6/134668803/dilawelokafuro-vogotorisixaku-petila.pdf
    • http://wexakevo.22web.org/nibitubobobetesuxuwadide.pdf
    • http://greatmasters.biz/chamma_chamma_dance_songrzc3j.pdf
    • https://cdn-cms.f-static.net/uploads/4392868/normal_600e464c7e6b4.pdf
    • http://retys.space/what_is_a_spiritual_blessing1yns6.pdf
    • http://remontlegko.info/swedish_alphabetp7ev8.pdf
    • https://rinulokol.weebly.com/uploads/1/3/4/8/134868038/34b51298cac8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_dbee62722b914d08adcfeb204fd3b45b.pdf?index=true
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_78e3f8df1a3647c18c7ed246aa85d517.pdf?index=true
    • http://paxafumalinuber.epizy.com/28782447194.pdf
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_b373cec04de7472d816a047df0e3a373.pdf?index=true
    • http://kegenag.rf.gd/online_leave_and_license_agreement_format.pdf
    • http://tiwomabot.rf.gd/bates_motel_season_3_subtitles.pdf
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_47b4a93adc9f440badf6a0970db86bad.pdf?index=true
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_ecc35d4050e044449ea77b23af825b70.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f725.bin
298c217dbf6b0264640679fc2ddff6f6119b3383804edf3a52a3771ca39121dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF725 5472 bytes
font_01_sfnt_off000109a8.bin
bb31da431070fd00666082ecaf2e8c416551d8bca1ad842dbdb288e85229d6c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109A8 10740 bytes

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