Malicious PDF — malware analysis report

Static analysis result for SHA-256 58890450268102aa…

MALICIOUS

PDF

92.4 KB Created: 2021-03-19 04:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c209de2399eb02a59206d27a83f7027c SHA-1: f0bbe8519874dc896931c0dc3889caabcd5cfb79 SHA-256: 58890450268102aa76a91008c8fe924ef5b1c0c85943e3fb172088760322e1a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits vulnerabilities or contains malicious content. The heuristic firings reveal it functions as a link farm, embedding numerous external URLs, such as http://opsnatur.fun/practical_skills_in_chemistry_3rd_editionium6g.pdf, designed to redirect users to potentially harmful sites. The presence of embedded JavaScript, though not fully detailed, suggests an attempt to execute code or facilitate the redirection process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8218

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-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
  • 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/aws?utm_term=supernatural+who+is+amara
    • http://opsnatur.fun/practical_skills_in_chemistry_3rd_editionium6g.pdf
    • http://dudoxanudito.scienceontheweb.net/kanipunodabexog.pdf
    • https://suxaniwaxunese.weebly.com/uploads/1/3/4/3/134385499/pujovezedugaxovaga.pdf
    • http://civiliscmq.online/panasonic_rice_cooker_parts_replacementzsnbg.pdf
    • http://bavolotaw.22web.org/194124947.pdf
    • http://axecheat6.xyz/knex_raw_exampleoljql.pdf
    • https://valuzobuxile.weebly.com/uploads/1/3/2/7/132711949/e0619d48b6d76.pdf
    • https://rawubewo.weebly.com/uploads/1/3/1/4/131405976/tubonaweretadarezil.pdf
    • https://latewumopinigan.weebly.com/uploads/1/3/4/3/134313498/4fe06d415263.pdf
    • http://susurrus.space/vocabulary_synonyms_quizkkb41.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zaxodeziwepaf.epizy.com/brother_pe770_software_for_mac.pdf
    • https://uploads.strikinglycdn.com/files/48c24c52-c154-4fbf-8e29-9915113605cb/72979116123.pdf
    • https://uploads.strikinglycdn.com/files/e88d4253-04a2-4ce1-b0dc-2293f720e87d/suvuzozezimiponodi.pdf
    • https://uploads.strikinglycdn.com/files/a3fec15e-21c5-41e5-adff-8c22260179c5/sahih_bukhari_book.pdf
    • http://gokegufokefewev.rf.gd/bacula-_client_rpm.pdf
    • https://uploads.strikinglycdn.com/files/a2287316-fbc0-4c5a-80e8-f18b157676f6/lulowukufufoku.pdf
    • https://uploads.strikinglycdn.com/files/a270a8e8-7124-419f-813e-50fc9439e2b3/meripetimewenotowol.pdf
    • http://bifovigavij.myartsonline.com/how_to_invest_in_stocks_exchange.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015687.bin
a2f164ae949c7c2c4cd459ddbe2ec28fae0aae96508fd3e4e3b2c3aa51470fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15687 5256 bytes

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