PDF malware analysis — malicious · 7baf374aab1c5544

MALICIOUS

PDF

92.2 KB Created: 2021-06-27 00:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 4619c315bb0d0846a219fdeae5571f50 SHA-1: 7d97532bc2d4e35c05c5b939b9e6050088060166 SHA-256: 7baf374aab1c5544e166e8dc29e45065ff4deaf57016b4a93d0c5a4348992fc2

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised WordPress upload storage locations and disposable hosting sites. These links likely serve as lures to download further malicious content, disguised as legitimate files.

Machine Learning

Nyx PDF Classifier malicious score 0.9786

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://catamma.ru/uplcv?utm_term=science+practical+file+class+10 PDF link annotation
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98a2449c6c---75780035307.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/843803166b54b3e43f42be539c302765/63291497522.pdfIn PDF document text
- https://kvkumariajnkvv.org/singhania/downloads/file/fejunoga.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5ab578276---tirizolokolejo.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/7372c1c50b603dc8e82d1f9769201b5d/21001074735.pdfIn PDF document text
- http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/64640035844.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082227ce515c---63891101943.pdfIn PDF document text
- http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb03b45555---kegelipinuliboj.pdfIn PDF document text
- https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ce9b29f54---tituwewozepetusesewab.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160789b0b7f53c---61894482697.pdfIn PDF document text
- https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/41qgmqbfae00f4khna86v7onlt/puresoz.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f80361742---91399596328.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8fb0932bd---xetojivevedasijuxoremikab.pdfIn PDF document text
- https://netshopnepal.com/userfiles/file/41089633126.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160983e0a30e67---puzunilonek.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7be63b331b---pifuvebi.pdfIn PDF document text
- https://ienter.bg/files/viliju.pdfIn PDF document text
- https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/5d7f75su6i53idhraa7di14bf8/86132278070.pdfIn PDF document text
- http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac3d117e7e---vezezimowikopolivizoro.pdfIn PDF document text
- https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/o38f0cj55j9pcqhcph007qpmfd/52371338584.pdfIn PDF document text
- http://cnhhgj.com/upfiles/userfiles/file/juredobutogijenij.pdfIn PDF document text
- http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4c45d5e95---junulevetovedano.pdfIn PDF document text
- http://woodsfamilypride.org/clients/2/2c/2c83419adcf4927d74d3defe18342386/File/69925590274.pdfIn PDF document text
- https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/jl404eq2ijeu6a0r18m775piej/linonoterotarifoxunasi.pdfIn PDF document text
- https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/7735a8e24abd58ab3aaae2e41044eaf2/8766684396.pdfIn PDF document text
- https://binarbaidrealestate.com/public_html/userfiles/file/xejek.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_off0000ed5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED5F	10604 bytes
SHA-256: `03a3e472b720ef99641e697bb0ebe737a3a13a46e166d80aee25208127b62c54`
`font_01_sfnt_off000105b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105B9	16248 bytes
SHA-256: `6c7e1b754cf38ee70ad76cb780c90d71dc4ff6fc3e14eab78a91c98fc4406452`
`font_02_sfnt_off00011b85.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B85	17404 bytes
SHA-256: `87e6eee1b391f7906fa1d83278913ba4117c3458ca12fb3bd7eabc5fdd3a9199`
`font_03_sfnt_off00014928.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14928	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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