PDF malware analysis — malicious · 191d7106dbed4d45

MALICIOUS

PDF

83.8 KB Created: 2021-09-10 15:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22

MD5: a6b883898e23b23db6f625af60850a30 SHA-1: db9d2b56a0280217ece3326a585d299a104da668 SHA-256: 191d7106dbed4d45b1352d1577c9e33722cc60d83cf69c1fa69fe9a160e59cd7

156 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://hanasushichoice.com/uploads/files/77046536043.pdf In PDF document text
- https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/f368fe6552ef0a837eca960a61656354/mivikuravawefoketu.pdfIn PDF document text
- http://kuhomania.ru/ckfinder/userfiles/files/fedisatel.pdfIn PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/161342d8b2565c---rabasejor.pdfIn PDF document text
- http://jlsxjy.com/right/UploadFile/file///2021090915150073499.pdfIn PDF document text
- http://tw-echen.com/uploads/files/202109041900337115.pdfIn PDF document text
- http://kubak-ubezpieczenia.pl/userfiles/file/44499450636.pdfIn PDF document text
- http://centronegozi.com/public/92485102021.pdfIn PDF document text
- http://theemasternetworker.com/ckfinder/userfiles/files/20244575550.pdfIn PDF document text
- http://www.almansori-ye.com/almansorifiles/files/namadox.pdfIn PDF document text
- https://mar3ol.com/Files/files/vebalajuduteb.pdfIn PDF document text
- http://ww150004.linebot.net/upfile/files/20210902175546.pdfIn PDF document text
- http://zentrumok.com/userfile/files/76588680117.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc4a592318---53820331911.pdfIn PDF document text
- https://congchungnguyenlieu.vnpec.xyz/uploads/files/87731804439.pdfIn PDF document text
- https://lazeo.nl/userfiles/file/79749144720.pdfIn PDF document text
- http://mgocsm.in/userfiles/file/88381139802.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/qfq3smefpca3v8obqrq3s835k2/42662569912.pdfIn PDF document text
- http://ucg-eg.com/userfiles/file/86925281882.pdfIn PDF document text
- https://impulsa.mantareys.net/uploads/plantillas/files/mojilibesunu.pdfIn PDF document text
- http://bastola.org/userfiles/file/durataludawokoterim.pdfIn PDF document text
- https://nikunjfoundation.org/ckfinder/userfiles/files/91098053454.pdfIn PDF document text
- http://unite-chem.cn/upload/files/dapejizugoxivetepizenibob.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=pubg+android+vs+iosPDF 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_off0000e16a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE16A	10456 bytes
SHA-256: `6fedeae66d467abe6cab2aff62d0f98398ac979105ad9aae2e90be3671b11e5a`
`font_01_sfnt_off0000f8fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8FE	18384 bytes
SHA-256: `c97cf27a8730ee980d102ef46a98093f53f0d65053392ff59d9a5c62c2357823`
`font_02_sfnt_off00012966.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12966	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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