PDF malware analysis — malicious · c30a384fbfaa329c

MALICIOUS

PDF

78.8 KB Created: 2021-09-24 03:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 97be2f6bdc90612314cd3d420e847270 SHA-1: 211f6d59b5a3c0ab0de30cef634e970f3a75e974 SHA-256: c30a384fbfaa329c7083c97b1487bff6f98ff1c228d934f3075b4e5f1ab7ac32

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external PDF files hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a QR code lure further supports the phishing pretext.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

Heuristics 7

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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://gibisch.info/files/files/25932927230.pdf In PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c736aab933---nipaxaxenukozaxakujas.pdfIn PDF document text
- http://pnalog.ru/images/file/49712028867.pdfIn PDF document text
- http://michelschuurmans.nl/images/uploads/file/vefugabakutanapu.pdfIn PDF document text
- http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4d12afbc3---21932482470.pdfIn PDF document text
- https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/pefenuwufa.pdfIn PDF document text
- https://shastriratanchatterjee.com/ckfinder/userfiles/files/71015271381.pdfIn PDF document text
- http://chinahongji.com/d/files/25217513862.pdfIn PDF document text
- http://bnblspecialities.com/userfiles/files/puxogogokumimeji.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/robosur.pdfIn PDF document text
- https://mimpishiosatu.com/contents/files/56320907712.pdfIn PDF document text
- http://parejalecaros.com/adjunto/upload/fck/files/vovorobo.pdfIn PDF document text
- http://vodnik48.ru/content/file/9552729077.pdfIn PDF document text
- https://www.pirkitpadangas.lt/ckfinder/userfiles/files/58279387212.pdfIn PDF document text
- http://insureavisitor.com/userfiles/file/81923911043.pdfIn PDF document text
- https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/18e54433791b4e2e29ebc83cc61b1e64/78808175963.pdfIn PDF document text
- http://sacoorhealth.pt/site/upload/file/wadejonaxexagevejo.pdfIn PDF document text
- https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/388c9c1ac2a2f626e068feab90373793/tozep.pdfIn PDF document text
- https://pesonabali.dswip.com/ci/userfiles/files/27794375903.pdfIn PDF document text
- http://ecoaga.com/documentos/file/55243863607.pdfIn PDF document text
- http://etalentlink.com/uploadfile/file///2021091301511581.pdfIn PDF document text
- http://attilacenter.org/userfiles/file/gasutesevebuwobujamere.pdfIn PDF document text
- https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/l6o2j1064t7mofd0m3k9j0unq1/datixexuzokil.pdfIn PDF document text
- http://jingmingtai.com/filespath/files/20210915171747.pdfIn PDF document text
- https://eklyps.net/images/file/mexagedenefavomanejabuza.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=pdf+reader+apk+file+free+downloadPDF 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_off0000d16f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD16F	16884 bytes
SHA-256: `ae0f4262e3048d3f07c6a6ec18fcdd76f01af90d257e75e78feb3ac953ecab82`
`font_01_sfnt_off0000fd3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD3E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011555.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11555	10404 bytes
SHA-256: `d5cdbbaa75f64d344dcd42c3965a796044b5ae333025a4c1fbcd1f7db5affb3f`

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