PDF malware analysis — malicious · 73340aed9586e712

MALICIOUS

PDF

85.8 KB Created: 2021-06-30 01:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: bc908ec6bca71b7f1d01d68b01b6d4b2 SHA-1: 5ffba841b5540bd0b03ec4d685326647fb1ccdf7 SHA-256: 73340aed9586e712ad3f2f43b37b3d71e8d117089015ba7c97430a49cb8a68c4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised or disposable domains, indicating a link farm designed to lure users to malicious sites. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', and ML classification strongly flagged it as malicious. The presence of these links suggests an attempt to deliver a phishing payload or exploit, aligning with spearphishing attachment tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://asupuro.com/user_data/image//file/lajum.pdf In PDF document text
- https://gloriouz.in/ckfinder/userfiles/files/78591666753.pdfIn PDF document text
- http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/abf486a5ba7947c7252045bf993b59b9/lojilutugekokedusorukixir.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a327df40012---jawobiboloxaluz.pdfIn PDF document text
- http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/iedgprohid5dtg3u1m1pporap4/78004508465.pdfIn PDF document text
- https://abofahed.com/userfiles/file/70168475051.pdfIn PDF document text
- https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/45cef2830a3ba17843fbacbc1019967b/48194373179.pdfIn PDF document text
- http://dwhs79.com/clients/15834/File/24760945831.pdfIn PDF document text
- https://horizontire.com/userfiles/file/befaze.pdfIn PDF document text
- http://ajisushionline.com/uploads/files/62452739278.pdfIn PDF document text
- http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b19156ab4---56876833015.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/ca98a6c9c29fcdaaad777dd1dadc2686/babudeka.pdfIn PDF document text
- https://sy-tech.eu/file/pafikaz.pdfIn PDF document text
- https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/76ec665728056bc32d5ecb876f0422b5/77997234656.pdfIn PDF document text
- http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/59350402407.pdfIn PDF document text
- http://studiorumeo.it/userfiles/files/26475382814.pdfIn PDF document text
- https://kisikana.hr/userfiles/file/surafewukotiwarudin.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/sunotizesadinoxi.pdfIn PDF document text
- https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/26c1c4c00aa1440296a071a88004f442/fulebimimoju.pdfIn PDF document text
- https://drsubhashawale.com/ckfinder/userfiles/files/piwerove.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b007e12f08---97406481175.pdfIn PDF document text
- http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a2004d1ee---82494551992.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befb2950ae6---juvakapokir.pdfIn PDF document text
- http://bpabv.nl/uploadfiles/file/gewazemugixuk.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086053be880a---ruxukokegoxoxizunefe.pdfIn PDF document text
- https://a2designbg.com/userfiles/file/62642304301.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=carinosa+dance+meaningPDF 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_off0000eaee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAEE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010305.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10305	10600 bytes
SHA-256: `c5c97d2220224c6251aef06a15a9d069334acc69f34dd87d120f2689ff83349a`
`font_02_sfnt_off00011af7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AF7	17508 bytes
SHA-256: `a1413bfbbc819e2a27ce9579ea57b45d5f8f4e4ea1ca9c2c0cf4d7b5565548ae`

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