PDF malware analysis — malicious · f3f0fa8605d3f4ee

MALICIOUS

PDF

87.5 KB Created: 2021-07-02 16:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 06b20ec64c812578596acdacf1cb6914 SHA-1: 0d3a0d73aee89507e49ee6b1e7a7ca0c29d29648 SHA-256: f3f0fa8605d3f4ee282ae270188e27207bb03db10b818a10a2108fcbc2bdcc99

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised websites or malicious content. The presence of embedded URLs and the overall structure point towards an attempt to exploit users through deceptive links, likely as part of a phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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 https://medvor.ru/uplcv?utm_term=scooby+doo+the+movie+online+free PDF link annotation
- https://aawyx.com/sites/default/imageuser/file/gakivisivujog.pdfIn PDF document text
- http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aebddcefa5---44224100630.pdfIn PDF document text
- http://www.medicellbank.com/userfiles/files/fosakokodiwuni.pdfIn PDF document text
- https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/mma47t3hogn8ic07581p7t4mbi/gafutetopexutixup.pdfIn PDF document text
- https://poolpoint.be/uploads/file/99588144419.pdfIn PDF document text
- https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/fdd0d306b1782b99d029d41e6415ce1c/92266336200.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16089c49bd2b97---neruvilanid.pdfIn PDF document text
- https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/75frdoul9hb32vjb4omn35bnpj/11059567380.pdfIn PDF document text
- http://danchrisjewelry.com/userfiles/file/tebamimutega.pdfIn PDF document text
- http://agcslohian.com/userfiles/file/budagak.pdfIn PDF document text
- http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607eebff6862a---6303498040.pdfIn PDF document text
- http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fa850861a---68628475757.pdfIn PDF document text
- https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2acfeb5055---95087232811.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/470c5e6f1c44aa1ab95ddc8fc33edfc9/44516838818.pdfIn PDF document text
- http://whalesart.com/uploadfile/file///2021060906291941.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6490aa44e---papirozuw.pdfIn PDF document text
- http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/6a6e75fb0b7ddd64fc1537c10c3acee5/88822176496.pdfIn PDF document text
- https://healthmatters.me/userfiles/file/junarefiwajumevetesuza.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752d83f36d6---zumovabedevebinewimo.pdfIn PDF document text
- http://hndgyl.com/v15/Upload/file/202166129438978.pdfIn PDF document text
- http://micronforgacsolo.hu/UserFiles/file/lubogeri.pdfIn PDF document text
- http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719fc0e5e9e---35797340799.pdfIn PDF document text
- https://salvamontbihor.ro/app/webroot/files/userfiles/files/volivoso.pdfIn PDF document text
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/rfa9qah6ncoh3qc0bd0rqllhh9/wuvurowuli.pdfIn PDF document text
- https://aravlicraft.com/cmsCart//upload/file/34597095310.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dd96.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD96	10808 bytes
SHA-256: `f77d3e481fb92beeb40e58c0a425806316aa8ad6123b3e5516f667a9c8332189`
`font_01_sfnt_off0000f652.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF652	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010e63.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E63	16240 bytes
SHA-256: `2960c386b9a9b6fd4ae9c821b23d8d7fb44f8ac5a7ed60b52eb8def5c7d83c93`
`font_03_sfnt_off00012451.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12451	16776 bytes
SHA-256: `9289a177f7bda5b7fce6bdbc6b19a1d1e6cde8aa4cc16323940a116ad2edf1c3`

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