Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f5056e75510d19…

MALICIOUS

PDF

61.1 KB Created: 2021-08-15 09:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 99c678a18e3d6ef34de849421b4fa6e6 SHA-1: 58a320b75dc1494ced8139d95a56720c33532720 SHA-256: 96f5056e75510d19329408d10842d8e16005f00584af17ec87a2f8f6a75139a3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier further support its malicious nature. The primary attack pattern observed is the use of a link farm to lure users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8083

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://amblamy.ee/upload/file/16678373058.pdf In PDF document text
    • http://chromatographvials.com/d/files/dozelabibexofore.pdfIn PDF document text
    • http://banquat.com/userfiles/files/wodaloxininukunujuzotifo.pdfIn PDF document text
    • http://sms-dk.com/FileData/ckfinder/files/20210728_DDE2C99F09920907.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202106262202218865.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/18340877242.pdfIn PDF document text
    • https://synersys.fr/contenu/file/20505944132.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/16663085496.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d36719e48---79926054019.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/33449705391.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/99073974209.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ec203ad43614fe98857a7cea79172a75/52191305461.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/3138dacbaf575feacaa281656fe53594/69266252257.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/296608301.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/pekisivaj.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/voxazotefij.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/kumunituwip.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16097f64e1249d---sisatibadidolixuje.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/waziwagobedumadoze.pdfIn PDF document text
    • https://wsbtitan.com/images/file/noxifazifesiregagenuk.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/88320036492.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/d8qja152gsqjmh19170ejrk875/larilagiworo.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/27d8a4f805748249f855fb09911c1cc3/luwudulolodatosapuni.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/08a7cf6bf1ca9f0fa09276e95c2649b6/91523339307.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=economia+basica+thomas+sowell+pdf+descargar+gratisPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD07 11276 bytes
SHA-256: 0da0b994f8f2ffba4112deb3aa068e9c8a6efbfc5a5d7aba44e0763291107280

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