PDF malware analysis — malicious · 803a74f934877b81

MALICIOUS

PDF

310.1 KB Created: 2021-08-16 19:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 5f9014ddd3a46c3baec8624290411f39 SHA-1: ea9880e8a93b12da5f4d1525b291dd7268340c05 SHA-256: 803a74f934877b81d97575fdfdca320d96e902b2c41980eb06b48f29f96f022e

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_INVOICE_LURE' further supports the phishing pretext, indicating the document likely masquerades as an invoice or payment request to entice users to click the malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.8628

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://medvor.ru/uplcv?utm_term=investment+management+mba+notes+pdf+ou PDF link annotation
- http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86bbd3dad5---15942386428.pdfIn PDF document text
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e9310988fee---34428796623.pdfIn PDF document text
- https://gangnampools.com/contents//files/97101040999.pdfIn PDF document text
- https://alutat.com/data/file/11366868744.pdfIn PDF document text
- https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/kbgs4bnorcoobi1scvpm92f20d/zejexexovuk.pdfIn PDF document text
- https://alihuata.com/userfiles/file/77482595763.pdfIn PDF document text
- http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084a58e8cddc---domadopibarogigulumumi.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609932b95e44d---41071738203.pdfIn PDF document text
- http://xinyuemu.net/assets/202108/files/20210810111542958232.pdfIn PDF document text
- http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7e083e35f---zelar.pdfIn PDF document text
- http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6b4febf69---90495514157.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750762ef03d---gafami.pdfIn PDF document text
- http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906a908e817---zovijenaselu.pdfIn PDF document text
- http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/xanepurikidulodupopukupiz.pdfIn PDF document text
- http://belgium-ex.com/images/blog//file/govenodosuxitipo.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/75b5cc7b2e3306ef526b027f8e94c2e6/vumimamevosibikuwuferala.pdfIn PDF document text
- http://asustainable.com/global/file/74805070637.pdfIn PDF document text
- http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/ef93d062cfada24467c360cc94c286f7/78280047277.pdfIn PDF document text
- http://gostinica-domodedovo.ru/files/8828909088.pdfIn PDF document text
- https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/gvpmf3lrtabd67udru06bq2l7e/sesenavakobovotavig.pdfIn PDF document text
- https://terminal.hr/userfiles/file/ketox.pdfIn PDF document text
- https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/b25q02ftvt1tkg42vrscj3m491/44156247100.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16093cb19b5a91---bagusonofilumeguju.pdfIn PDF document text
- http://tantex.org/tantex/tantexuserfiles/file/banozuvusazotulugaviruki.pdfIn PDF document text
- 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_off000462d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x462D1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00047ae3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x47AE3	19648 bytes
SHA-256: `9f5ace5549f3a422e1312ccb1e1098e170ddf6973d897fa63611ae2513588fa8`
`font_02_sfnt_off0004af4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4AF4F	10860 bytes
SHA-256: `c383a75e42248636b0f4e2a3f67c5ad10b1e18c177e8b2f0c29f6643de1df6aa`

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