Malicious PDF — malware analysis report

Static analysis result for SHA-256 2920458bc7608e14…

MALICIOUS

PDF

82.7 KB Created: 2021-09-21 15:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6b77f48a7e4772c4d73fe5f0f779928c SHA-1: 00dab5d50de27de2815214cb8e374a125cddae7b SHA-256: 2920458bc7608e14c1e1473888e5da8aa5ea234ab32c588f0f1ddbb714163249
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress uploads or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or credential harvesting via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://telegid.tv/userfiles/file/83635885673.pdf In PDF document text
    • https://butagallery.com/userfiles/files/41596116820.pdfIn PDF document text
    • http://juditphotography.com/picture/userfiles/file/vibofepadunuw.pdfIn PDF document text
    • https://najemwroclaw.com/userfiles/file/lefezurakikugivarusafe.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614436092c948---36724667451.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/zerinivulobo.pdfIn PDF document text
    • https://aneri12.cz/res/file/sewefi.pdfIn PDF document text
    • http://relindalouisylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lazenepuwe.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/80588104627.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/lojogeguxememaxopokufuwok.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/fewasipo.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/f633842f6be6a75220a0dd8a84f60347/vuzupuri.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/moxesuxixigerurezuta.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/zevedim.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/38871066757.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7066c2918---23196480023.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614139f2820db---87884591467.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161405b07be633---dupasotesimijisoz.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e169c692d4---92377563066.pdfIn PDF document text
    • https://agros.net/uploads/file/3691273909.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/54971170891.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/fuselagajopaguraxikox.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/96084317071.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/91582268139.pdfIn PDF document text
    • http://varvshistoriska.com/file/xexalasujikivaf.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/dudeligavutage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=dark+mode+for+chrome+on+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000dfe8.bin
1f6a820550ab8db93b50dd71d4aa11279600a4f5a31f93f2e9e4998fb6096e5b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 17716 bytes
font_01_sfnt_off00010d60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D60 16792 bytes
font_02_sfnt_off00012577.bin
d3ea55f376598e490aa4379bca1e3c322559a66e9ca6525faa1248fa7f6fbd46
pdf-font-stream PDF embedded font (sfnt) at offset 0x12577 10520 bytes