PDF malware analysis — malicious · 9ad0bceb3c42f33d

MALICIOUS

PDF

89.0 KB Created: 2021-07-03 07:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 8b37015a180324f21a3cb289e7502976 SHA-1: a70ff53676ad1c618c4a86ab9c33f6f0f878ae43 SHA-256: 9ad0bceb3c42f33d6a50faafded282ca8ceee195a5f863e6c0370d46ddfbf16d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to lure users to malicious content. The PDF structure and embedded links are consistent with a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

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 http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075886b342f8---41644123675.pdf In PDF document text
- https://oxi-dental.ro/imagini_ws/nivolirodowijurozokofew.pdfIn PDF document text
- https://communeouchamps.fr/userfiles/file/81979124079.pdfIn PDF document text
- https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/cf88de75e68db3cdb177254d99df41a0/33518115262.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a34589e8c59---tevusonovebivajemusajo.pdfIn PDF document text
- http://al-bandak.com/userfiles/file/dinupebepejadogogajipezut.pdfIn PDF document text
- http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d18490a0938---36530873551.pdfIn PDF document text
- http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/0h8mq3a478doq1jr0o3h3o50p6/23365220653.pdfIn PDF document text
- https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/lsln2avl45nmcnclebidm63qe1/keruxolemojagixezodak.pdfIn PDF document text
- https://caribemed.com/userfiles/file/jowamixodomog.pdfIn PDF document text
- https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/e788e42f255733ac238bb3c2fc0a0b38/xedonezuwafejiroxumodazes.pdfIn PDF document text
- http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1f84a26b4---99589253015.pdfIn PDF document text
- https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ca4d8b495efaff03bfbed4c6834368d/10590148641.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/95498306364.pdfIn PDF document text
- http://wmc21.com/ckupload/files/75070304265.pdfIn PDF document text
- https://atcotourismtravel.com/userfiles/file/12181119522.pdfIn PDF document text
- http://myjobcareer.net/userfiles/file/2021061603080573499.pdfIn PDF document text
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcea1e0d64---1880408950.pdfIn PDF document text
- http://wurbs-hanau.de/userfiles/file/nodetisumo.pdfIn PDF document text
- https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/qkhom7vlfumr3ir967ifkclfn0/81144578506.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3bfcafb6f---539584920.pdfIn PDF document text
- http://magnachip.cn/userfiles/file/20210515195643.pdfIn PDF document text
- https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/b889ac711929acb731bf6373c40d8a09/9135007053.pdfIn PDF document text
- http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/782dc9ff47eddbb35c78e6512daa592e/woxuwulilabopilelubarusa.pdfIn PDF document text
- https://businesslife.com/content/file/jeratezetizafilugati.pdfIn PDF document text
- https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/e0778192a01398dba05cd6cd7d5c6b3c/figum.pdfIn PDF document text
- http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19a168e4a9---12653675607.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=one+subject+and+one+predicatePDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f357.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF357	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010b69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B69	19060 bytes
SHA-256: `2198e1852d558ef321769643033a86b12fd7c929c724eed551b1d49ec2e5c700`
`font_02_sfnt_off00013b9a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B9A	10856 bytes
SHA-256: `a2646d7e27a5a88b804c8bec1babeeacac4a95eef16a6fcad511e56f2d1e1960`

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