PDF malware analysis — malicious · 4ce74f27b42b8f9b

MALICIOUS

PDF

86.0 KB Created: 2021-07-02 08:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 9759084b9c25226618329cc26635d880 SHA-1: a4ca5ea355989e9f192f901c04c937e0d0c1c9fc SHA-256: 4ce74f27b42b8f9b6ae15f7998650d64087f8457e9ca5e2e414b045ed986de59

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs suggest a link farm designed to direct users to compromised websites or phishing pages. The file's structure and the presence of external links indicate an attempt to exploit users by redirecting them to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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 https://queure.ru/uplcv?utm_term=give+an+example+of+neutralisation+reaction PDF link annotation
- http://primaneighbors.com/userimages/55564752029.pdfIn PDF document text
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160820b69da52a---97128225038.pdfIn PDF document text
- http://www.buildingmalawi.com/images/uploaded/documents/moxekedefago.pdfIn PDF document text
- https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/gncta22jd64dv8640d6ql5engm/35612556042.pdfIn PDF document text
- https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/6f1fb7e82643536db42293a481dd2f6c/83587335607.pdfIn PDF document text
- http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9257f1c95203e46b313be6fc6ca99ca5/desotonaxenivikolawodusa.pdfIn PDF document text
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160967e6452639---77056231390.pdfIn PDF document text
- http://longchimvac.net/app/webroot/uploads/files/68988826321.pdfIn PDF document text
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822800cbefd---sunadeviluv.pdfIn PDF document text
- https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/da9f61ae4482715d65a6938f3c5fed6d/talabu.pdfIn PDF document text
- https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/b80b8dd92ce5a99698d6c45d4ce02fbe/53000855717.pdfIn PDF document text
- https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c63873043---64404731335.pdfIn PDF document text
- https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e0988e9db---likejoxepuzoziditetupin.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d1c829859---xozemufuwok.pdfIn PDF document text
- https://parfumzone.ro/files/file/kozikiwupezew.pdfIn PDF document text
- https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/e7tm5qm98vgbri2v652ebdlnn6/gosunomezeniwa.pdfIn PDF document text
- http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3670da005b---15139784239.pdfIn PDF document text
- https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/q6unethpalkbn1k1mca6jgeja3/63658723160.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607356edd81e2---86172189463.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608515fe13862---vekuxasezebulovinewelata.pdfIn PDF document text
- http://jl-vacuum.com/upload/files/zowutupijozofiweritobotin.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/85imuga5e1de9d213c3r3lived/93725890985.pdfIn PDF document text
- http://secretinvitation.net/images/files/18115099653.pdfIn PDF document text
- https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/58htf57v18mnqdi93aq7sfdbbp/sesuxuzuteferu.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_off0000e9f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9F8	17792 bytes
SHA-256: `27effe6a234d0d0e56c64055727b479e672744023cec3b3e624d252807a940e1`
`font_01_sfnt_off0001191a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1191A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013131.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13131	10948 bytes
SHA-256: `4177f656dcb0ed5265522e7c12e2e6a7356954b05ac1118e3f26fda805a5ff91`

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