PDF malware analysis — malicious · 02d1370a33d6101a

MALICIOUS

PDF

76.1 KB Created: 2021-09-03 01:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 55c4440c5bfbd1470fbcb162ee9a51f1 SHA-1: e2536263bd54e3976337679c9531708e09efd324 SHA-256: 02d1370a33d6101a4735bf70f0131671f45b3669cd33cc72397d0c2bfdf622b6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF acts as a lure, likely for phishing or to download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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 http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/bfe3208773cd81a40d213e5473f80e81/6375088007.pdf In PDF document text
- http://avvolodin.ru/upload/file/kozelimawaniga.pdfIn PDF document text
- http://fulns.com/uploadfile/fckedit/file/16306181164c5S.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/f883ecf18dd444037b84bc026f291391/wijaxeloxe.pdfIn PDF document text
- http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/76016295749.pdfIn PDF document text
- https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b891c914e3---49923640139.pdfIn PDF document text
- http://archidaldegan.eu/userfiles/files/72980187807.pdfIn PDF document text
- http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11917358ee---sidoxekinufi.pdfIn PDF document text
- https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073742c120c3---91703994127.pdfIn PDF document text
- https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/13267da7fb4fcdbe01f5ce3e27c2fe27/mepinov.pdfIn PDF document text
- https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/c0lgk6l6is5ucudplt11fbn9m5/56455184516.pdfIn PDF document text
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f7510e584---18192730235.pdfIn PDF document text
- https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/khur3th6kmvaufk9v5dn01436g/66203610289.pdfIn PDF document text
- http://jinwoosmc.com/userfiles/file/88170746338.pdfIn PDF document text
- https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/91b1d281570ad51ced9f2c604eee7a9e/gotosetowuta.pdfIn PDF document text
- https://digicpictures.com/downloads/sepatiw.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd21096007---nogofoget.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802fbd965d1---3719281010.pdfIn PDF document text
- https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/711e833d8283d48e379e975ad827a436/13370388353.pdfIn PDF document text
- https://zapret-rf.org/web/img/podborky/files/4079957217.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/e73fda9a9fa918282752e2125db9b887/61650379282.pdfIn PDF document text
- http://www.asslar.de/downloads/vuvanelina.pdfIn PDF document text
- https://banderlogclub.ru/Files/file/joxifusogevusuxul.pdfIn PDF document text
- https://condicionamentofisico.com/arquivos/file/magere.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=geography+notes+for+upsc+pdf+free+downloadPDF 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_off0000c4b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC4B5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dcc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCC7	16916 bytes
SHA-256: `9c2618af3e4dfcefb4100c68363d2424a6d49f3b3f20a55c0a36630dbd33be78`
`font_02_sfnt_off00010833.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10833	11148 bytes
SHA-256: `9e84b316912ec219afa038ab581e6295ab5a7f0ac4a5bf9776c6964e96906837`

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