PDF malware analysis — malicious · 323c87341c3ffeb8

MALICIOUS

PDF

86.7 KB Created: 2021-07-07 21:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 28b04ced9cb82fe36528b19913a3951a SHA-1: 5f45521ed16f0f3cab4dc1e31c3568fcf58a8f07 SHA-256: 323c87341c3ffeb89d9ab3b40b0ec5488108bf9a4f0ee9f86f7c07bc46c94135

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress installations and other disposable hosting, likely intended to lure users to phishing sites or download further malware. The presence of external URIs and link farm characteristics strongly suggests a spearphishing attachment attack vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://irlanc.ru/uplcv?utm_term=red+rose+image+with+black+background PDF link annotation
- http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d846c1d665---29186219416.pdfIn PDF document text
- http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e439ab6563f---69925871994.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf5696e7c7---tumepagul.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/nopet.pdfIn PDF document text
- https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/v7f91349j3oc43j0brujdtvhi2/biposeb.pdfIn PDF document text
- https://greenfuturevietnam.com/Upload/files/54183776960.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/a2366deaa50a29b11c6cb687edc5f353/88601670075.pdfIn PDF document text
- https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/40b48ca7ad659c065645086dfc7983f0/nabilebibozove.pdfIn PDF document text
- https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/8f6b2cc3af10da3c693c66ceaab1665e/14529818577.pdfIn PDF document text
- https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085a4d0e2959---34879934690.pdfIn PDF document text
- https://irisapp.cn/uploadfiles/fckeditor/20210515/file/16210222963509.pdfIn PDF document text
- https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/5cba3fithc28mtv0ij5f19r6rg/89312335997.pdfIn PDF document text
- http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5e288c022---75531003025.pdfIn PDF document text
- https://aihr-iadh.org/uploads/FCK_files/file/notonuxuduvawe.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bbaccd58b---lojutuwe.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/bgmlgm80hlbcpv6kdkc63ar395/zafirume.pdfIn PDF document text
- http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607513ac0d736---2564303490.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160befd03c9daa---sugesivagujinomiru.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/b8pr6odhn2orjgaj1f2tbrkfm2/35552819827.pdfIn PDF document text
- http://coffee33.ru/archive/file/sekagiwevegojiba.pdfIn PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/0957bc3309b1b7159cb1c04e14bf2e3d/76366288580.pdfIn PDF document text
- https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/a997cf7fa3ea827080a4c6f6b9e35f5f/38609130028.pdfIn PDF document text
- http://birons.net/wp-content/plugins/super-forms/uploads/php/files/4de99ad7c00445128487a12f360987df/wutitazojimemevaje.pdfIn PDF document text
- https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c140bd44891---45396020521.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f07f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF07F	16544 bytes
SHA-256: `7159908ff04e0d7a962f221ff01aa1cd61a59855f90761ec917bf2379926b00c`
`font_01_sfnt_off00011b6a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B6A	11280 bytes
SHA-256: `a953f50172450a612dc5e9e83231f5a310cb1c6fa02c9a49fb20b4ed78b0027f`
`font_02_sfnt_off00013591.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13591	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.