Malicious PDF — malware analysis report

Static analysis result for SHA-256 929f66a75dc276fb…

MALICIOUS

PDF

67.1 KB Created: 2021-09-27 04:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 37072eb9efca36443c31b27a7806355c SHA-1: 3df8ca7b6de992be9ef26b649c77cc15e4905aa3 SHA-256: 929f66a75dc276fbaf535fd126039064d76a25f8bf9f9652cf33b61e4f6ba28e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous external URLs, many of which point to compromised CMS upload directories or are structured as link farms on disposable hosting. The primary purpose appears to be directing users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7031

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/uplcv?utm_term=turkish+free+followers PDF link annotation
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/1140118787cf99fa3665ce4a29bd742e/roxiwunejijozub.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/rikixogimipe.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161342cd96bdcc---sutumim.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/03/mamezipitov.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/jabaginasibiripesapawobir.pdfIn PDF document text
    • http://www.sczct.com/up_files/file/26386135360.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/dalutiki.pdfIn PDF document text
    • https://searches.onlineconvey.com/userfiles/file/22765131386.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/90226075968.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613101728a719---tiragaturefawunajumif.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/3299164204.pdfIn PDF document text
    • http://remobudostol.pl/pliki/sopibunupiramarevi.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/41992851916.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/68856935781.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/21246551774.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/98611538952.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae01f6d272---xufukofenakiwesotakojorem.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/afqf8ftoothdjic1b0ko8isd42/lodulogikapixujamefosin.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/13230474842.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/gusozilofomudu.pdfIn PDF document text
    • https://ms2oke.com/contents/files/18561090688.pdfIn PDF document text
    • http://gsxr.hu/userfiles/file/kuvabijurosoz.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/10472266369.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB212 10188 bytes
SHA-256: 4a2bd5312badf180094c4066179694af66871beb8876a09d68a91b488b016d98
font_01_sfnt_off0000c910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC910 17428 bytes
SHA-256: a3098287e0ee288311e975dc990d9ae943b7f50ce51ee363249298f3129f365d
font_02_sfnt_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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