PDF malware analysis — malicious · 1bc7e04640b6e280

MALICIOUS

PDF

87.8 KB Created: 2021-07-07 09:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 009445f5d42eba5c5b4cbeccee990d65 SHA-1: b67d522fa612210592740185b84e0a8f55eae654 SHA-256: 1bc7e04640b6e2809d5d2e575f4f3b236791266b7d6e60e089e6189df498ff29

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and compromised CMS upload links indicates a likely phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/0fb41264547ea0b2db4aa9d0337cd619/39710886397.pdf In PDF document text
- https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/km46805an822d22nd3pnb31rvi/ketapasegezimi.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/5eb7433c59a7b1946f87d5295d24c137/45297631457.pdfIn PDF document text
- https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/076bd634e14a1482745a3a07777df058/46867458314.pdfIn PDF document text
- http://bloomx.com/sites/all/sites/bloomx.com/files/xejifarolosobewana.pdfIn PDF document text
- https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/306652f2794b5462f3e3550411446026/rasorolinobidozuku.pdfIn PDF document text
- http://mea-travel.pl/userfiles/file/79952997965.pdfIn PDF document text
- https://polandpools.com/contents//files/7390620383.pdfIn PDF document text
- https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/712f8dbedac66f0c0799d1bc055a91a0/530047732.pdfIn PDF document text
- https://dvg.asia/ckfinder/uploadfiles/files/paxujelivatulejo.pdfIn PDF document text
- https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/2b06bf1e094b58f62f4ad20cef6a20dc/66807664667.pdfIn PDF document text
- http://sahrugs.com/userfiles/file/ravupadasesewufen.pdfIn PDF document text
- https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/5d85c7cfc0bc395686ad333118a8c063/26695824856.pdfIn PDF document text
- https://amatnieks.com/pictures/image/42393499231.pdfIn PDF document text
- https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/0hp4gumgfe7aisgo7h6u3gh34u/bagadifetedegojuw.pdfIn PDF document text
- http://www.kickcommerce.com/userfiles/file/76944192641.pdfIn PDF document text
- https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d23cd2b422---padonofawigokewev.pdfIn PDF document text
- https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/f34e28e841101491922d7f9e5664ef6d/8818285680.pdfIn PDF document text
- http://merlegdoktor.hu/tmp/70744702922.pdfIn PDF document text
- http://aristosaigonhotel.vn/uploads/files/4110155143.pdfIn PDF document text
- http://agarimo.com/archivos/archivos/60445913309.pdfIn PDF document text
- https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/469acebfb388630ca6467bced3458fe9/letora.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f39fde13e0---povejonuzasuxorowamu.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b52dacb94---satokiwuku.pdfIn PDF document text
- http://christmaslandint.com/userfiles/neferoxuxuzodukifitamiwi.pdfIn PDF document text
- http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160bf071c4f21a---69394103739.pdfIn PDF document text
- http://sattamatkapatti.com/userfiles/file/tematazasose.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=good+pectoral+workouts+at+homePDF 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_off0000f303.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF303	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010b15.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B15	17160 bytes
SHA-256: `59ac04a2807d7f19fef984c74a9543aaafe6de78c5be742a2d7bc58198552091`
`font_02_sfnt_off0001380f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1380F	10900 bytes
SHA-256: `7c15ba9a273f0ed813ae72cbc2251db8a05ac220eb5410f9cab7f652209b61d4`

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