PDF malware analysis — malicious · 703b5ffdbdd67907

MALICIOUS

PDF

167.4 KB Created: 2021-07-02 05:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: b7ed5f55fd75a8fa38292d165ffadbdb SHA-1: 71a8b7db516494c21ab308dec84427db01c6fb3d SHA-256: 703b5ffdbdd6790772e6d9f96b5130bccf57db5a8d7c5e2d9b1e0f88afb50670

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is structured as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9713

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://geometrarontani.it/userfiles/files/78285559306.pdf In PDF document text
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bb1801dff---56420399440.pdfIn PDF document text
- http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ca00c099b58---pozaravolonasimavutemat.pdfIn PDF document text
- https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ouea1paclc7htomb14n3eja9i2/sudugekemek.pdfIn PDF document text
- https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/40825a9a3a824655521e3ef70136745c/54085958487.pdfIn PDF document text
- https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/30ff1920a74717f0c4e6a27d82b1ff4f/nafubanapiwa.pdfIn PDF document text
- https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca716d3c782---rofosofo.pdfIn PDF document text
- http://cathyourhair.nl/js/ckfinder/userfiles/files/43164828232.pdfIn PDF document text
- http://avondale61.com/clients/e/e2/e25739fb73bf6f2fbed92e75d980d6c5/File/zizajepolukekuj.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/7b75b7a7338edfaecde5122cd1e1ceb0/21932877052.pdfIn PDF document text
- https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160d9295da9a3f---14491613512.pdfIn PDF document text
- https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8df97bff0---gilepes.pdfIn PDF document text
- https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c39c8093a---81609662115.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160745162d0473---10745733667.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/ffefcad1a31e0ee8e7ac3efcd41de61f/57728495042.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/dge0uis9f2alt4rl1ipsqjosv6/49731010833.pdfIn PDF document text
- http://kompletucetnictvi.cz/files/file/39404496130.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce7bdcec59---bofoxofuzizawemabix.pdfIn PDF document text
- http://thessalonikiflights.com/files/files/91884311023.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/104de127ebc258a92c90903821907ffe/juduxebut.pdfIn PDF document text
- https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/59202b724e5f006cdd8495312c43aa42/63638752920.pdfIn PDF document text
- http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/6d74c25f9fc672abfc13fec4f3fc5a9f/14868346438.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607742d1ba501---fogupakowerux.pdfIn PDF document text
- https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/9200f789a8e67721457e66a8150e1ba2/49096474788.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608324723d043---15404796653.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607348e2749af---36411991390.pdfIn PDF document text
- http://jarosi.hu/files/file/19760851398.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=kant+point+of+viewPDF 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_off00023104.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x23104	17744 bytes
SHA-256: `a316ca6add7827c7d64f6390bf59c2d6540de6ff01e5cf30ef8b822390fd21ce`
`font_01_sfnt_off00025f59.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x25F59	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00027770.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x27770	10180 bytes
SHA-256: `1ff150e3b8118eb6b9a33682c9bd11dd4beeaa21def98520a8b9189868532515`

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