Malicious PDF — malware analysis report

Static analysis result for SHA-256 98aeb14cd4609426…

MALICIOUS

PDF

91.5 KB Created: 2021-08-23 14:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 60d3bab4f1a4d7e96d0838e74e3edbf8 SHA-1: 4b148ac668e3ae6b0aa3ab242231f43b259e8d03 SHA-256: 98aeb14cd4609426f9cf6d9c7a0b518068f64550fd620a29aea6c6dc95b292e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • 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 https://volnynaklad.cz/data/file/fipajurazukixoz.pdf In PDF document text
    • http://musorcentrum.hu/files/article/file/saleziwopurugujis.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea501eb385---salipaxilokexejewux.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3e7d829d2---32403373989.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/45079458864.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210807005419.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/696e4494cef116d7b264391778308714/wenuwesenemelikajezagel.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/34247891986.pdfIn PDF document text
    • http://meskerjager.nl/media/files/25114277752.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/86479245878.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/81216074153.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed8bf54699---49723135564.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/mexaxusoxejifu.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16116da4e62a41---jedezogemeganu.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/16323155234.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/234ae1999e94027b83f219ae6ad436d9/fiwojogapad.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/57788070910.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/jipuresuzudadoderutakeko.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bc1b11d81---174759275.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/vemomadulow.pdfIn PDF document text
    • http://recviem.ru/img/upload/jofujoreta.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724fad92ec2---fovuzowomafow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=famous+french+actors+femalePDF 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_off00010329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10329 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B40 10588 bytes
SHA-256: 0f777dddeee4b8aff5591b89249b40c45867c57316a102bd9e55b3992bbb61ea
font_02_sfnt_off00013340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13340 17336 bytes
SHA-256: cf0090e38c34b67dbdb66413124af51058e480b823da3cbaf5edf5c935502661

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