PDF malware analysis — malicious · 00502f65d134ead9

MALICIOUS

PDF

80.1 KB Created: 2021-09-01 11:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: efaa15d1bea16c918babaee6f0b5369d SHA-1: 174bc1a62a667041f7bfb56fa69a566fdb4f4e82 SHA-256: 00502f65d134ead9a905464b5b5bdae271e7671861a28e243244684b759abb07

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggest it is designed to exploit user interaction to redirect them to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9936

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/7e9fa0a7ec0e2b052a1632ca0ad23e60/nolojuxaboderotemebiju.pdf In PDF document text
- http://vom-ragnaroek.de/uploads/file/wizonatalozuka.pdfIn PDF document text
- http://brno-skoleni.cz/ckfinder/userfiles/files/43673213482.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/c228ccda1a70f0dfb9a170d96a88e178/89971472395.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606edaeb68a8c---13805777434.pdfIn PDF document text
- http://mazdooradda.com/userfiles/file/92196452748.pdfIn PDF document text
- https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/9ppa397atuahk5hd8s67huuk03/tikovobivokalitupi.pdfIn PDF document text
- https://binarbaid.com/public_html/userfiles/file/dolapitujilo.pdfIn PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbc986caf0---xunutizuja.pdfIn PDF document text
- http://studiopassarotti.it/userfiles/files/xujefiramutidekinezefowun.pdfIn PDF document text
- https://birudongker.com/contents/files/xekumujajet.pdfIn PDF document text
- http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcee8265b8---gebomifago.pdfIn PDF document text
- https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/peo0pmm7vurn5tnu90iv5g3fr0/68371234611.pdfIn PDF document text
- https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/86c190ed29b496790b34d0bafd6f0a52/tivoxogufisivaxuxa.pdfIn PDF document text
- http://usateatop.com/_upload/files/dulagexubuvodez.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094b4e31415b---7849301350.pdfIn PDF document text
- http://redemaisfarma.com/userfiles/file/xefazofojuwebus.pdfIn PDF document text
- http://school19-zav.ru/userfiles/file/pafopujen.pdfIn PDF document text
- http://safiorida.nl/operatori/userfiles/file/63692020200.pdfIn PDF document text
- http://tomekorea.com/userData/board/file/32977453216.pdfIn PDF document text
- https://poganyvolgyi.hu/userfiles/file/banan.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d24ed36fcc---waxisenakali.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/0dd29548d6c7a44f478f06bb54868e12/sunajubaxufexanisasupajun.pdfIn PDF document text
- https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/9faccd90d7babfcdc610214914e36cf9/50875248878.pdfIn PDF document text
- http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608768646d34c---kanifaputikasofotuvutolik.pdfIn PDF document text
- https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609322b58bcb5---nosefipiwofitasud.pdfIn PDF document text
- http://ykzn8.com/upfiles/editor/files/59679862417.pdfIn PDF document text
- http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c545e66f5---99184499609.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=dout+meaning+in+tamilPDF 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_off0000d0cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0CC	10284 bytes
SHA-256: `c9623de71837a48c1f60b60504ddc3d0a02f1bc69a7fa768e619e87aeab3e7f3`
`font_01_sfnt_off0000e7e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7E1	19272 bytes
SHA-256: `5e116fdfabd9fd1a00e86803e89068f2bbe650fdcf01f5fa8f8c6f6078ea53b8`
`font_02_sfnt_off00011977.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11977	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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