PDF malware analysis — malicious · aa8c4560a79fc217

MALICIOUS

PDF

79.3 KB Created: 2021-10-18 13:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06

MD5: 80b2f92402ce429ca6552e77f6eda272 SHA-1: 9f944820a743e9fb5195d51f11a40a27486db768 SHA-256: aa8c4560a79fc217780404842bfd73531dd7b96a6a5b878c37e9c0443ae8063a

156 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9968

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://progetec.org/userfiles/files/89303510743.pdf In PDF document text
- http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16164a30508447---12103603728.pdfIn PDF document text
- http://olympicthesportshop.in/uploads/futupopatomuxirawitil.pdfIn PDF document text
- https://fetogram.com/images/upload/files/pinisizivatisafajexaz.pdfIn PDF document text
- https://ijfbacknumber.com/editor_up/40287691783.pdfIn PDF document text
- http://dongtienlamnghiep.com/upload/file/luzanofup.pdfIn PDF document text
- http://nj-rshb.com/v15/Upload/file/20211091859425972.pdfIn PDF document text
- http://baschin-heizung.de/meineBilderAlbertGrundschule/file/sibumusekiwopibo.pdfIn PDF document text
- https://comtraining.cl/userfiles/files/49371946953.pdfIn PDF document text
- http://thietkewebbacninh.com/webroot/img/files/8348304508.pdfIn PDF document text
- https://www.studioline.ie/ckfinder/userfiles/files/perutalosutufepitaloga.pdfIn PDF document text
- http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/e72b9200e108e2c28b708f5ba7cae486/25148732820.pdfIn PDF document text
- http://terryloops.com/E/file/28744963075.pdfIn PDF document text
- https://kligi.viart.lt/ckfinder/userfiles/files/15778995296.pdfIn PDF document text
- http://chinawin-consult.com/userfiles/74781879378.pdfIn PDF document text
- http://evo-models.com/uploads/userfiles/files/pezaje.pdfIn PDF document text
- http://inwallendorf.de/userfiles/file/buxemisew.pdfIn PDF document text
- http://mdfgiare.com/upload/files/zesapomekilizixop.pdfIn PDF document text
- http://murzilka.biz/images/uploads/file/ludesumefiwisigis.pdfIn PDF document text
- https://chv.vn/userfiles/file/12425218508.pdfIn PDF document text
- https://threadworx.com/thread/admin/uploads/file/30328142923.pdfIn PDF document text
- https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613756f934c75---piduti.pdfIn PDF document text
- http://feedproxy.google.com/~r/MbOu/~3/1hHberoKktI/uplcv?utm_term=flamingo+book+class+12+question+answersPDF 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_off0000d353.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD353	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000eb6a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB6A	11288 bytes
SHA-256: `00befff8973fc61854f3f277d4ccfa6b8ebe0e0bcc7f86bf653f71990001d218`
`font_02_sfnt_off000105bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105BF	16268 bytes
SHA-256: `a5db46e7802ec7ddbba789dc083a17026e2e5bf1630d36b20b621b8fd36e9497`

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