Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b0a5e3cfbfe0be…

MALICIOUS

PDF

60.1 KB Created: 2021-09-30 11:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7fd506fe0b2dbedeba1ff330ce754262 SHA-1: e879ace0af28d154eea3c516f2ce7bdb7ad6dfd7 SHA-256: 59b0a5e3cfbfe0be76004480fdab3d1505eae6c6a786a029d4dea2d32f1b6402
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to various websites, including those hosted on compromised WordPress installations. The presence of 'utm_term' parameters in some URLs suggests a phishing or spam campaign aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6644

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=is+spinach+high+in+antioxidants PDF link annotation
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/4cb0574f7adfac357da4ebf2b6e08645/24072611409.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/2jrapr985kkesn7kubakkfqglh/kiwajalufawo.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1614b5fdce7808---wajakovuwekebomibede.pdfIn PDF document text
    • http://polins.org/public/userfiles/file/lijakoxeparabofipitujefu.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/fekufixejolanijanu.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/161480626eb882---69572643757.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/2021961011282180.pdfIn PDF document text
    • http://boletin.alicantehosteleria.com/lib/ckfinder/userfiles/files/mewexefotuvafurojew.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/zefegibobap.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/pituloduno.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/1978346595.pdfIn PDF document text
    • https://pansky.ru/UserFiles/File/dobax.pdfIn PDF document text
    • http://kindergartenhelden.at/upload/file/daferufelasi.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/zulexo.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/65240882743.pdfIn PDF document text
    • http://skrn.cz/pic/file/25139106844.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/74860875625.pdfIn PDF document text
    • http://lulanjina.net/upload/files/34070391931.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/pkiqgejubue26gobcq5v001tkp/36297477438.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/kasazuwafaninebe.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/juvadusoxukilap.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/wuwubemozepon.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/fotuw.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210910155109.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB900 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD117 10568 bytes
SHA-256: 6807756123e34820d5afe895cfce0a5022ba95b6f9f4d03d673dc84684f8c729

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