PDF malware analysis — malicious · 1797ba983577385d

MALICIOUS

PDF

84.6 KB Created: 2021-07-12 16:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 165f55e929a683af32c5061b8a9e72e4 SHA-1: eb20cf1f672d4a245179e31250934272e5641793 SHA-256: 1797ba983577385d050ac8e72b5e4a53815ee18a77fefdb3d85f957a388cffca

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The presence of a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, further supports a phishing or malware distribution attack pattern. The embedded JavaScript likely facilitates the redirection or download of a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9972

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b9be021c8---famijipukazasebawiwur.pdf In PDF document text
- http://antifftech.com/uploadfile/file///2021050600174220.pdfIn PDF document text
- http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947226796ab---84557640372.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160700805144fd---4953012983.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6563983be---98860807359.pdfIn PDF document text
- http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160790687c39b4---tubavorikidu.pdfIn PDF document text
- http://shiinamotors.com/js/upload/files/sawuwereleba.pdfIn PDF document text
- https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9eb64b5fc---3344247500.pdfIn PDF document text
- https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/b1ac6f0ed7e21eabdd87028fc15de038/babinixabi.pdfIn PDF document text
- http://ucinnovation.ru/admin/ckfinder/userfiles/files/pavofozuvovadirapetapafoj.pdfIn PDF document text
- https://travelworld.ro/userfiles/file/kelover.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4ff19a86f---10155831812.pdfIn PDF document text
- http://angelcabrera.com/FCKfiles/file/92237058835.pdfIn PDF document text
- http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/makibex.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/8766b90730360d84a133d753c364078b/memiwidetirujizigo.pdfIn PDF document text
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/77455369d2fc90bd4d6c57826f16ffac/kujozisim.pdfIn PDF document text
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d2afb641a---34114763841.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/54a9e8d8ddbeee65ec30f51fc0e957b1/61859445685.pdfIn PDF document text
- http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/3328a7baa8aecc1b5872c7b4b127c413/kapeminaxoruzerur.pdfIn PDF document text
- https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1547d17300---29939088468.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d5a756101c07d4b680942b277eb9b937/7477995307.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=does+soil+type+affect+plant+growthPDF 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_off0000e930.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE930	16576 bytes
SHA-256: `318748d0b203972882f1174045943eecde7753be5b8e2733b4f63eb0eafbb19e`
`font_01_sfnt_off000113ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x113ED	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012c04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C04	10960 bytes
SHA-256: `796332c06609026ca6cde78c3ff5eba41fb4c7bbb2184dfc040433286458b0db`

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