PDF malware analysis — malicious · b55d4fa8685b7a39

MALICIOUS

PDF

95.8 KB Created: 2021-07-05 08:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: a42e6f0bb629b7d7567462e0785c017e SHA-1: b32acf76bd23f4a1678cbf79468aaff9f601fecf SHA-256: b55d4fa8685b7a39010c7b40ed84f74ba7256b5b62fa2a0ab5fa7e171de3873f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9786

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://nomylo.ru/uplcv?utm_term=brother+p+touch+75+manual PDF link annotation
- http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/kosogiguvatosi.pdfIn PDF document text
- http://lotusromeo.fr/app/webroot/files/userfiles/files/85489642990.pdfIn PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094512407f9c---84635439318.pdfIn PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22d45b173b---ziligogisosizozakuf.pdfIn PDF document text
- http://shinex-auto.com/userfiles/file/kemanadepamuru.pdfIn PDF document text
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/56bcbec719c21b0e76c930b1a67af02c/gipoludele.pdfIn PDF document text
- http://vejwun.cz/images/kegowi.pdfIn PDF document text
- http://soupworld.de/upload/file/4164209468.pdfIn PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608041786336a---xubugekibipowerig.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/aumm8loq98doj0gcs090srcef1/fowuxedugelorokebof.pdfIn PDF document text
- https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa91b83ef65---vedalev.pdfIn PDF document text
- http://bienbao.org/uploads/files/72339954395.pdfIn PDF document text
- http://joyearland.com/ckfinder/userfiles/files/75435699418.pdfIn PDF document text
- https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/fd6d509306bed45d50be4acef35eb5a4/14634992791.pdfIn PDF document text
- https://samsungklimalar.com/upload/ckfinder/files/wudofapikatirif.pdfIn PDF document text
- http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfd2ce6a381---durelegew.pdfIn PDF document text
- https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/305fc042cf9e20a796ed761a9945d596/batamelobevajowit.pdfIn PDF document text
- http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f684f5db06---gusipafidoxeluwakudubo.pdfIn PDF document text
- https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609202a724948---wululureturipoka.pdfIn PDF document text
- http://adamlegal.com/userfiles/file/ziruzerulafumokiwal.pdfIn PDF document text
- http://anhuicrew.com/upload_fck/file/2021-5-21/20210521001205723463.pdfIn PDF document text
- http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8ef084948---potamozesotetagod.pdfIn PDF document text
- https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/82431bd5c2564751d7f2a0d3f66c0517/22336684351.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805a5615bf2---6902700811.pdfIn PDF document text
- https://leganordavigliana.it/uploads/file/mizibezamewagido.pdfIn PDF document text
- https://samudra99.com/contents//files/dizinetidukamatoxexurulu.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fd0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD0B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001151d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1151D	17096 bytes
SHA-256: `dcd9f0dd6df496fa2f0c84d0536dda138e1501149140172ad61b3333bc622e7f`
`font_02_sfnt_off000141df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141DF	16132 bytes
SHA-256: `049965754d90fbe2ea61b096af565c79ac3211fc07d606e7cb0725d47bd62a07`
`font_03_sfnt_off0001574d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1574D	10716 bytes
SHA-256: `c9191f888fc78f4134a83b92715c6757148cbcdc9d7a7343a72aa8a02c503559`

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