Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2c99d0bc31a6a2…

MALICIOUS

PDF

77.9 KB Created: 2021-09-04 05:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9659228442a2e998d858b67f16e28e1e SHA-1: b75b8fe1db3563a75e0771714d2ef05954f72345 SHA-256: fe2c99d0bc31a6a20c363f499699444a8052e879fe309944f32271ddf2f9fe28
124 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress sites and utilize link farm techniques. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The primary function appears to be directing users to potentially malicious websites through a link farm, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4895

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://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16094becf01a19---duturomo.pdf In PDF document text
    • http://daiichigroup.net/uploads/news_file/kalipadibopiteviponas.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a57872f474---50969717628.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161236530485e2---42071405309.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/1nokng6237kv2saugo94gdv01g/fidelogufufa.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099159f86ae5---sobarebebezesokomedogomu.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a359809b939---24348149720.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/485c6536ae74b67658c8775617145cd0/niwokiwaf.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/viwukesoxutalilofozodesa.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078688b9d08a---nudem.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/fuvizomenujut.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/a1741d313a4a9b5921fc32e25c88ebda/zatubiw.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/531a1a5f300151223204077b915aee77/79843905512.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/f92bacb2c6397a32e7bf187e7175298d/wubikelivatobavixudabo.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c946a4bb83---43724064883.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/25967368602.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/puwaxajukub.pdfIn PDF document text
    • http://leton.pl/userfiles/file/fajewolotuginatofik.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/58055261526.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e92ba723f3---mibet.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098388a016df---52747695574.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210626135243024.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b4763eedf0c1abbd7105ddfa7f1b7216/14517797140.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b5380a4a4---7202039541.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/zozajalebusikefogan.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/6aus3l3kkf8omtfggcqgdla62c/davelujifupume.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d05fa4825---26467508284.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/e3b99d9ec8f1683beb7f47931b4b4e3f/38586640334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=introduccion+al+derecho+penal+libro+pdfPDF link annotation
    • 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_off0000d97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97E 10740 bytes
SHA-256: 9802cafc5fc625a7e39ad8e7d2920c029335c15d5f6328489b705e657943d99f
font_01_sfnt_off0000f1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E3 18880 bytes
SHA-256: a165b6c3f37212cd3ab6b173f76c6172dc20ff4e3dde5e0a765514c17d822267

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