Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b7eb88509708f9…

MALICIOUS

PDF

70.7 KB Created: 2021-06-27 21:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: fc34d15496b4f2d5009181e958579722 SHA-1: 889901c95a7fa10c68c5550039cf03974491f67a SHA-256: b8b7eb88509708f9af65b24140ef056eb488e1af0f2405c09f59954e3c1040f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites. This suggests a phishing or spam campaign where the document is intended to lure users to malicious or deceptive websites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5042

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://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/4qc4sn00tiajmnrlmb4rlchvde/salom.pdf In PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16082d18b851b3---dovabuguvuba.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160935caa34532---48852142197.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d41cdd3d5---risefajara.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/b037df74e512fd6220077ec7818737ec/kuvomatovumal.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076832590da9---wufabazijudixo.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/bimiruk.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/6aba4135cf9619f768ac6de132016347/vitasureragemazex.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abeaef3e387---jorufeletiwanipatomuraju.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dfa77349c---76637562097.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160d68c52c5627---kamamawitawibuverin.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/84d2880a4fbd4f07dd026f35141246a8/13459067452.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/41adc175686e80af8dd3296f556af497/91273858457.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b12371a009e44df86db65808bf8b9f12/bikitagutukulewedabeb.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/11921621601.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/89627092683.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/4f06787a6a8201949d02909dbff77163/xerixidunefisuwetoku.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c290cedc2eb9a2eb111542c1702df3b6/16530897107.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/295721baa02037f4a24a3d0614ad797e/rodoxaxixafi.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/2d878ba87010c4caaa76c956ebc64f32/fipozi.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/27653054807.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/56880777028.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc54795d404---fuguxivusunenedezuze.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/63ab6f1a7e25700883ee0794fba05c0d/93765349285.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/77d06d77558a6f56e99d75b29b41561e/soxemerirelox.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/fobuxew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=good+manners+and+right+conduct+in+collegePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E2 10956 bytes
SHA-256: d6a558bbd4a3a5d2bcdba92950c69aa4e6782190b627d6682a835be176719190

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