Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad4ba2ef0c346de…

MALICIOUS

PDF

81.7 KB Created: 2021-07-24 21:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e51a43c26b0575eb6687b29ea2b12457 SHA-1: c550c8da5b960a148192089b479da7a32dc83bed SHA-256: 8ad4ba2ef0c346dec03abe8bfddbba9d02ce306c7f5438b3eb474a38ef5a760c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, specifically identified as a phishing trojan. The document body is heavily obfuscated, preventing a clear understanding of its direct user-facing content, but the overall structure suggests it's designed to lead users to malicious or compromised external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5802

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://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/22b0a308fd1289a4ade7a867f5352c11/lufexeziz.pdf In PDF document text
    • https://demircanticaret.com/userfiles/file/fexikorakimujadisovopob.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609a95e3436c3---20600827098.pdfIn PDF document text
    • http://emannsltd.com/userfiles/68296435137.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/4b2c1bfa6cfb6ce0c1ada9c0378a5a02/24665642195.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6676a9c05---54974729340.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/dirapotelodebazigojubu.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b649702a472---99127484566.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/625ccb85445df7230ce76183073e52ad/lugokofamarifejudida.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd465b5342e---xiketetejasipogiwavoxu.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/1f6775bda27ee01f757ef244e18532ba/fijirugarowomemoxaweselo.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089521548a58---tunukajofomebevorijunisef.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb996bf9d1---suxedosanotux.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/252558ae1bf73c4f3d6aeffd6578ca4c/32299233543.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/kixitejoderafe.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/94122356303.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081af88bea5b---50271306088.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075f4d509a39---fakusunadaviwope.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef06be7ba4---pomulomomusinubetasesas.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0904da16b7dfbd700207d06f88065140/37246820051.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebf1dc6683---38806986718.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a1724f2a6e1---69875512901.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021051518572363.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/duzapugin.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/ca848ce8825d869af33f97afb0c21b2a/jezorojiwu.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/notakajokesukurir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+use+jenn+air+ovenPDF link annotation
    • 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_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 16528 bytes
SHA-256: e5b320eef237124191d2c4e1097508b64f547ab947d95a50f0a5805af7ac805e
font_01_sfnt_off00011dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD5 10428 bytes
SHA-256: a5ea8ef3f842e7b50ad5d73e9b5110620ca4bd7fe8b3c38822e4c779712f9e7c

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