PDF malware analysis — malicious · 514305bc85939056

MALICIOUS

PDF

89.2 KB Created: 2021-09-02 11:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 3cb76a9aff111e08ca0de1a59b63e9c7 SHA-1: f12903e4765aa13f92112d5ea5adb30fd78a8308 SHA-256: 514305bc859390567e2dd1f49db9d42532abd16e8f1d6cb497b10179a00a005a

156 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. Heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised WordPress installations. The presence of numerous URLs, including those with UTM parameters, suggests a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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=roadside+picnic+pdf+download PDF link annotation
- http://lesmashclub.com/imgUpload/files/8811659665.pdfIn PDF document text
- https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/773c4b05268edee6ff2f941d5828c491/34958604834.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160798a7719782---60166758501.pdfIn PDF document text
- http://autovoda.ru/upload/files/dekatogedesibolifa.pdfIn PDF document text
- http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160afa098128a9---38270805126.pdfIn PDF document text
- https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/fbeda608504985c755b3afbe3d8a0a6a/bubuz.pdfIn PDF document text
- https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/b3ebb333b542c8ddd42731ec347f3839/76181723611.pdfIn PDF document text
- https://tungafilm.com/dorceiys/ckfinder/userfiles/files/23654062710.pdfIn PDF document text
- https://shoppingplanet.ro/ckfinder/userfiles/files/86765819045.pdfIn PDF document text
- http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9346e5ab9c---panozotozen.pdfIn PDF document text
- http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/tuvatasiwen.pdfIn PDF document text
- http://chiangmai-clean.com/user_img/files/naviwebop.pdfIn PDF document text
- https://angkortaxiservice.com/userfiles/file/70095294267.pdfIn PDF document text
- https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/f3e83ff14bcac039c2f8228e840b77f2/zorexe.pdfIn PDF document text
- http://pokeocncafe.com/uploads/files/67692726516.pdfIn PDF document text
- https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/2m5e89cte100pp05r2uc5fu502/73736326094.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/51bc663bfbe9f4d70c97d1e6e3afc35e/50189090909.pdfIn PDF document text
- https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/0b8cf327528aacbb7ab131dd409e60e9/xorizamavexe.pdfIn PDF document text
- https://nakatarikaszel.pl/app/webroot/userfiles/file/22187546928.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/9e267a302d7d031cf41739deb379deab/95950623634.pdfIn PDF document text
- https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc84e3388c---kipuwo.pdfIn PDF document text
- http://tourbusan.net/FileData/ckfinder/files/20210628_5B105B7260DDACDC.pdfIn PDF document text
- http://studiofelician.com/userfiles/files/36556732309.pdfIn PDF document text
- http://baove24h.org/upload/files/74666162804.pdfIn PDF document text
- http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/11678022748.pdfIn PDF document text
- http://xn--franzsischebulldoggen-lec.eu/userfiles/file/lipafimezumom.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/tbo2s5r83hqf2s9slm2n9skvv3/52883149644.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_off0000f57b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF57B	10544 bytes
SHA-256: `94fcbc57edefe2e10b1151a174542becba361dbe52808eb7fb4249b090e6098f`
`font_01_sfnt_off00010dab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DAB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000125bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125BD	18888 bytes
SHA-256: `8d3cc170db5769c62ab91055e8367e48d56eb04ad69c8b4ae8adceb521273e9c`

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