Malicious PDF — malware analysis report

Static analysis result for SHA-256 527cc4a18a3dc9e1…

MALICIOUS

PDF

104.1 KB Created: 2021-03-26 15:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3e5ff2e591c3a79ce74b8002718f73fe SHA-1: a3d547fb46311130999075ec476256d94b6124aa SHA-256: 527cc4a18a3dc9e1096a99c22f310828c2c5b73457d006844d4c37e6d7cc9991
94 Risk Score

Malware Insights

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

The critical ClamAV heuristic identified this PDF as a phishing trojan. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a strategy to obscure the true destination. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4704

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://botokaw.ru/award?keyword=assert+25mg+bula+pdf PDF link annotation
    • https://sazebajamafogi.weebly.com/uploads/1/3/4/2/134265793/7868191.pdfIn PDF document text
    • http://bufibinokurun.scienceontheweb.net/delta_kitchen_pull_out_faucet_parts_diagram.pdfIn PDF document text
    • https://wewokidopubix.weebly.com/uploads/1/3/0/8/130873978/bef410e4869b.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/da4d9ee.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/basibeponison.pdfIn PDF document text
    • http://tigukifi.getenjoyment.net/sokabexuvizunuzapas.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/c2f12e54bed7.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/creative_writing_worksheets_high_school.pdfIn PDF document text
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/18738.pdfIn PDF document text
    • https://wobufijurix.weebly.com/uploads/1/3/1/6/131607063/ludijeg.pdfIn PDF document text
    • https://falibapop.weebly.com/uploads/1/3/3/9/133997194/suxoxapifinope.pdfIn PDF document text
    • https://dazuzidasepod.weebly.com/uploads/1/3/2/6/132681566/1831738.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jojisoxig.epizy.com/triple_bottom_line_reporting_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bdd1dc5-10c1-4b2b-9191-ed9b3e723515/jumusirevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e38355-49b3-4862-a3b0-ed4eac256cbf/ridgid_sliding_miter_saw_10_inch.pdfIn PDF document text
    • http://zumemopusel.rf.gd/vesokufimozovopefi.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/green_valley_lake_fishing_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/23751580546.pdfIn PDF document text
    • http://fatofejeripise.rf.gd/cambio_climtico_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b33806-7aec-4415-9088-0604be436147/70866481807.pdfIn PDF document text
    • http://lotidasifiteg.epizy.com/dotugobepivijefodenijudid.pdfIn PDF document text
    • http://zekafoforom.epizy.com/xikiloxezop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2f508f-e1a9-406a-acc3-613e2fb41d07/true_to_your_feelings.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/24167170742.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/51545801195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80924dba-a9f2-47a5-88c5-b732bba10497/6031214030.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/fujazowiwawanitojutinaji.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/super_mario_bros_3_game_guide.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001634b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1634B 5748 bytes
SHA-256: 01927f845c670af26f70f33208c3d7fd052fda16da1f61b149fd191d7c3f22ce
font_01_sfnt_off000176c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176C8 15612 bytes
SHA-256: 05980d9f18d7888282b1ad86cde18cb1312d4e3a894980173abd3c7ef77d7082

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