Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11363cd92e585c7…

MALICIOUS

PDF

69.5 KB Created: 2021-03-30 06:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 893e9098bca80d71e49f493193191dd9 SHA-1: 628193b9aff1e4faf682e80c7fd05294d401957c SHA-256: f11363cd92e585c728b61bdde9b0e5a61d49d1bf177eac4443b0fedc66ad383a
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to Weebly-hosted PDFs, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure itself is used to host and distribute these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8129

Heuristics 4

  • 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-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
  • 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://bologen.ru/award?keyword=aberdeenshire+school+holidays+pdf
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/dujopomajazawut-rizuwodupapopaz-kiruwu-zazifedesoxogus.pdf
    • https://biruwilajefi.weebly.com/uploads/1/3/4/6/134651793/sexebesevubuk.pdf
    • https://zajuzuvo.weebly.com/uploads/1/3/4/4/134474050/8203131.pdf
    • http://xovekofetovo.66ghz.com/transcribe_audio_to_text_apk.pdf
    • https://xekanowodupap.weebly.com/uploads/1/3/0/7/130739303/397786.pdf
    • http://vupiziriwopo.22web.org/94590500532.pdf
    • http://papopeputato.iblogger.org/ratios_and_proportional_reasoning_course_2_chapter_1.pdf
    • https://suviliter.weebly.com/uploads/1/3/1/4/131453542/949050.pdf
    • http://detonicro.website/sennheiser_ew_100_g4-me2k5125.pdf
    • https://wavarojejepifog.weebly.com/uploads/1/3/4/5/134590929/rejow.pdf
    • http://jozebemi.iblogger.org/multivariate_statistic_regression.pdf
    • http://rte-ita.fun/800255768811xbv.pdf
    • https://mikatafa.weebly.com/uploads/1/3/1/3/131398449/ripawopofuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://derekage.epizy.com/sputnik_sweetheart_haruki_murakami_epub.pdf
    • http://rawuwad.epizy.com/corporate_visiting_card_design_vector_free.pdf
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_7d1e84e48fc64274a574e40b5e08de86.pdf?index=true
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_0b88b7b4f48b4cfa9f690bc0fa93e24f.pdf?index=true
    • http://soburuwukipo.epizy.com/53612759882.pdf
    • http://wawugodeti.epizy.com/vefilut.pdf
    • https://49884795-3b66-401c-adaf-b59e999553af.filesusr.com/ugd/8bd6c9_0e1e468c97ea487f85413b8e046a170e.pdf?index=true
    • http://kizosit.rf.gd/json_stringify_with_formatting.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe19.bin
4b877b73adfedfbd11d2c4cf8afc784808d70eb37c95b7b135091d57cb801e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE19 5184 bytes

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