PDF malware analysis — malicious · 3c7da899e6e179c0

MALICIOUS

PDF

90.2 KB Created: 2021-09-04 00:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 6be8773a319ec73b9552b1b5bcc48f11 SHA-1: 1fbe781e2081bb41064dc7543abb58163e7782c3 SHA-256: 3c7da899e6e179c051195ed449a06a1305c829238d01fb08e521586ab4388497

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm on disposable or compromised hosting further supports its role in directing users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/6e177480b545db93eab51e4ab0b7410d/67835088147.pdf In PDF document text
- http://pc75.net/upfiles/file/1625471849.pdfIn PDF document text
- http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086fa8244675---67866683584.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad889488951---66101046842.pdfIn PDF document text
- https://matrainagycsalados.hu/userfiles/file/dajizoji.pdfIn PDF document text
- https://dcmheavyequipment.com/admin/images/file/66488674399.pdfIn PDF document text
- http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d936b16e3---dumigoluname.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/5kj6p1hgd77gq4j9acfrf695dk/70115274710.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/36lndci76j68fdor88ak2rvef6/84727384386.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/7kjj9gbvv3a3i0irjq8p9r8f6v/7397909800.pdfIn PDF document text
- http://cnc-soustruzeni.cz/files/file/jajekoreliziraxajoveve.pdfIn PDF document text
- http://sakra.sk/storage/file/80481350651.pdfIn PDF document text
- https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075499e82b60---77448002855.pdfIn PDF document text
- https://bawwabatrizq.com/userfiles/file/jawerex.pdfIn PDF document text
- http://nzozkrowodrza.pl/uploads/editor/file/bekimefuwupifumeduki.pdfIn PDF document text
- https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e194af5da---70710168328.pdfIn PDF document text
- http://bortran.com/upload/image/file/20210708084800.pdfIn PDF document text
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5644915d4f5d7309550a31ebfc13af13/94895655441.pdfIn PDF document text
- https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/2r5n6if2ekafsa5b8884c4if4k/zadujedezebukixu.pdfIn PDF document text
- http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/e3d04036921288a3274e26bdf202b584/xeferazixulibejuxaw.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160872abb1e8cb---dobeluwasomezipole.pdfIn PDF document text
- https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/be29c736ce1bcdf3845ea7ab01b32e1b/taludajataminefagufigu.pdfIn PDF document text
- http://soles2walk.cz/data/file/21170451520.pdfIn PDF document text
- http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/68621620934.pdfIn PDF document text
- https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99efadba70---pitojuxifafegeza.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=insertion+and+deletion+in+linked+list+in+c%2B%2B+program+pdfPDF 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_off0000f97b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF97B	11004 bytes
SHA-256: `5f2df6a5a9a6fc1004b77dd91b7d15df5031a692f8bc46a926854cdbe01411fa`
`font_01_sfnt_off000112d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x112D3	18164 bytes
SHA-256: `ad58606c2974444309184613932d7879ca656520155daa5c1360db278a9a734b`
`font_02_sfnt_off0001427a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1427A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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