PDF malware analysis — malicious · b043c3fd4c9a2696

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 13:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 7f2bc6a86dbbcc8d145351cb4ffc56aa SHA-1: 8ba01104f84b63fd456305a47b14d19ae6d8d5e9 SHA-256: b043c3fd4c9a2696b37e49675ab20c54a070d9d442f2c169113e64ae23016647

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a malicious document intended to be delivered as an attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

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://garglob.ru/uplcv?utm_term=mandala+coloring+book+pdf+free+download PDF link annotation
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e819f16e94f---rixusen.pdfIn PDF document text
- http://gayaarchi.com/userfiles/file/20210713211151.pdfIn PDF document text
- https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/ef6eba58a6b6e133d1b6a5efcb0944ff/zugujojosadorewebixu.pdfIn PDF document text
- http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fb3888f44---33800287687.pdfIn PDF document text
- https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/gikhecdeu0lmfe9aohs6ei2ue5/tejuduj.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb145a7943---68083883816.pdfIn PDF document text
- http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb92e8263d2---jumin.pdfIn PDF document text
- https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/4de4426f4409ed83604d6d35f234fc33/rusuketanijobufabizovud.pdfIn PDF document text
- http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/5qr4anvb5145orauosol5tpb92/32955179940.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/1ef2da29bf997f8dd20d6f38fe11da8b/lipejapupuvurapas.pdfIn PDF document text
- http://bdn10.cz/files/file/73614106707.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c6d2c94e9---27600338462.pdfIn PDF document text
- http://twozonechickenlasvegas.com/uploads/files/31581357502.pdfIn PDF document text
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/db20ebd1b4c8c1b6a8bf177efeeb6827/63594271158.pdfIn PDF document text
- http://kopari.hu/files/file/55220005351.pdfIn PDF document text
- https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120e7a3d31de---vawarefijelaruve.pdfIn PDF document text
- https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/vscon0jjgiirf6lvbsigld3k6o/netudibaribij.pdfIn PDF document text
- https://vibangthuaphatlai.net/uploads/files/94153306065.pdfIn PDF document text
- https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/u0k88bvi5outtvtiteiq5kvr3e/43615294098.pdfIn PDF document text
- http://dongduong.net/Images_upload/files/zarawebolofurozi.pdfIn PDF document text
- https://perfecthospitals.com/ckfinder/userfiles/files/60817344587.pdfIn PDF document text
- http://arohitourandtravels.com/userfiles/file/sogijus.pdfIn PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dcc4d36721c---zinalamarukef.pdfIn PDF document text
- http://hytechplus.com/userfiles/file/xodibepotatub.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_off0000d59b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD59B	17288 bytes
SHA-256: `de93e6df8600ed6fadbfd930fb27a149c8a62674e39cae55e0ed4a7ffc50cab1`
`font_01_sfnt_off0001029d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1029D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011ab4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AB4	10840 bytes
SHA-256: `4f34d754f314c78e18f061207b95c7fa32841a2d1b88ce2ea58eb6813a2b1677`

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