PDF malware analysis — malicious · d89710934873cddc

MALICIOUS

PDF

79.9 KB Created: 2021-07-22 06:25:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 720f0b6b87a8be52a7ed0498b43a3add SHA-1: 4f129efc71f138720f5b4b1772014c8de643fc99 SHA-256: d89710934873cddcd7e4611deb4b37313de8c82efdc798408c42ecd987f5723c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve as a distribution mechanism for phishing or malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

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://teakdeck.pl/files/file/88003217226.pdf In PDF document text
- https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa5ad713e0---laxitakodepojof.pdfIn PDF document text
- http://jagatjyotischool.org/jagatjyotischool/userfiles/file/4939052079.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f90c2730e---jabivisuxetogewe.pdfIn PDF document text
- https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6c70d695---49089403632.pdfIn PDF document text
- https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/9eb6uih8je5f88ggbrs1kd2801/zenikafefoduxeriwirar.pdfIn PDF document text
- https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/1fhje4cflhdnkfq289o23554ml/newivawesidibisejam.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f6c647f30---vokuzenutotalufijiw.pdfIn PDF document text
- https://cochleartudaskozpont.hu/files/1342085969.pdfIn PDF document text
- http://kbchina.de/upload/wogokivoredoxariremadoge.pdfIn PDF document text
- https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/32f4f696322b195cca9de77e624df0aa/watimapexekupivawojadajam.pdfIn PDF document text
- http://dribblebar.pl/userfiles/file/kakalav.pdfIn PDF document text
- http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/pb97oslp2d132vavij135en9h0/jaruzet.pdfIn PDF document text
- https://chambres-hotes-aube-bleue.fr/userfiles/file/30895498384.pdfIn PDF document text
- https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/eb309daf05fd78f515ef59927f818084/xezositekepiwuzijuf.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814e92e4f25---22104921123.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8eb31d52a---75980908112.pdfIn PDF document text
- https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/67fe9858274254a26022640fa0e0f20a/27438934162.pdfIn PDF document text
- http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/ffc7c1da49100aa90c0e0e750ef116b8/72667831990.pdfIn PDF document text
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a22979414b9---pabaxumibatupitanir.pdfIn PDF document text
- https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/4dd99da96efc8a52111acbddc0140083/gitunileveber.pdfIn PDF document text
- http://shqinze.net/admin/upimg/file///daxajiduzixitemixaz.pdfIn PDF document text
- https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b18fd9a71bb---19582836020.pdfIn PDF document text
- https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16081bf97e0f53---66738677457.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=react+native+reanimatedPDF 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_off0000d2bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD2BF	17868 bytes
SHA-256: `b62f661dcf3895b2f9c3993a9f4765f350aa4ad73567712a28c6430ec25c9aad`
`font_01_sfnt_off00010231.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10231	10308 bytes
SHA-256: `88201b0fbffb7dfb9747adf9df37c5f80dedbe4e427701ec09106e17c4cf812b`
`font_02_sfnt_off00011968.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11968	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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