Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49aaf7c913ae8e0…

MALICIOUS

PDF

56.7 KB Created: 2021-09-01 07:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 96961fb7b41935095d3e1773202888e4 SHA-1: 93a0a9e184fa124be2ab8fe5462c201e6472696e SHA-256: d49aaf7c913ae8e0628b88955232b93edf7ee721ce60c2c1c25d5693d9a3a499
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it functions as a link farm, potentially leading to further malicious content or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9847

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 http://spl-designs.com/ckfinder/userfiles/files/kosagojiwedafijigusedelu.pdf In PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/36519462204.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/gabodunevusiwejuz.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c250c14c16d---nuwabotomef.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210727090254.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/gafasosoworebijos.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/79514588182.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fdc59687409---nakazizovamuwibareketu.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/jixonegezajas.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/dee20056f4b8e536170e31f92260e3ed/korukasanikepulu.pdfIn PDF document text
    • http://mcutech.net/files/77372732980.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f379960529e---71999731401.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/xedapixaro.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b54ba14f1e0---17886953785.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/32329179276.pdfIn PDF document text
    • https://laser123.com/geektic/files/42082616369.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210725002233_0wr1j7.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc49a4709f---21944382628.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/36943238425.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1610b61110f3c6---25874858301.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ddfaaa57d---2255027672.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/32950305880.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/eeqgghv85a43rln9cvpr0qar6p/93617289264.pdfIn PDF document text
    • http://beijingteye.com/upload/files/27006793911.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=non+homogeneous+linear+partial+differential+equation+with+constant+coefficientsPDF 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_off0000ce08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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