PDF malware analysis — malicious · 9165dcfabd973de8

MALICIOUS

PDF

85.7 KB Created: 2021-09-16 10:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 42297d6f22a44f8c598080873bf92919 SHA-1: 373fc303f0ca4623bdd2e118237556d0a24f5e1a SHA-256: 9165dcfabd973de8d970ecdeb4a82c47580255bb3fdac3393fefe226375afa43

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. It contains numerous embedded URLs, many of which are hosted on compromised websites or disposable domains, and one URL specifically uses a search term suggesting a lure for downloading drivers. The file's structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://philabc.ru/uplcv?utm_term=samsung+mobile+usb+modem+driver+windows+7+32bit PDF link annotation
- http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/161413c3f61c5e---67954999669.pdfIn PDF document text
- http://fitviewer.biz/files/file/13856794736.pdfIn PDF document text
- http://gianenricofabro.com/userfiles/files/fekukivovidewanixag.pdfIn PDF document text
- http://krasneclanky.cz/uploads/37933355081.pdfIn PDF document text
- https://larustt.com/upload/ckfinder/files/vividamesunotidoza.pdfIn PDF document text
- http://laconchigliacasevacanze.it/userfiles/files/fawepogorezimirixajunakig.pdfIn PDF document text
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/032ehr6ijsbnhherdno3fcj9f6/gulukizuvo.pdfIn PDF document text
- https://aluminiosarla.com/userfiles_arla/files/wakiwuruzubapixejijalum.pdfIn PDF document text
- http://ibookingkr.com/FileData/ckfinder/files/20210914_3E3E3B356B10B241.pdfIn PDF document text
- https://gs-hemeringen.de/ablage/userfiles/files/rirebogerogupo.pdfIn PDF document text
- http://herium.net/FileData/ckfinder/files/20210907_909B2C6F12693B6A.pdfIn PDF document text
- http://snuhonors.com/userfiles/file/54031427488.pdfIn PDF document text
- http://solmoda.it/userfiles/files/8599050749.pdfIn PDF document text
- https://idosekotthonaveresegyhaz.hu/files/files/13813473080.pdfIn PDF document text
- https://fuze-pay.com/ckfinder/userfiles/files/9589615177.pdfIn PDF document text
- http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/lefiwolinuvi.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/c7325bf0c16858b334bd45f7ba576358/sewanonopuzivisoraxomaven.pdfIn PDF document text
- https://sogelec-eng.com/files/ckfinder/files/32314580092.pdfIn PDF document text
- https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd79d874b1---71537478871.pdfIn PDF document text
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335504143ac---2229312823.pdfIn PDF document text
- https://yucekalipmakina.com/tsrm1/img/userfiles/file/10938546060.pdfIn PDF document text
- http://robertoantoniz.com/resources/original/file/68055184455.pdfIn PDF document text
- https://lexconsulting.ro/webroot/files/media/vivufitowofoxugaredu.pdfIn PDF document text
- http://collegium-connect.nl/ckupload/files/vixikejimab.pdfIn PDF document text
- http://baove24h.info/upload/files/sifiketegogurezik.pdfIn PDF document text
- http://hujiangsy.com/upload/files/35007478910.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_off0000ddf3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDF3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f60a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF60A	11400 bytes
SHA-256: `3bf5357d3e43bc8cb07d16241094acdc238c0b07c9c4b86f677e28cc385b5207`
`font_02_sfnt_off000110d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110D6	21448 bytes
SHA-256: `a64149169b643df4ad91b8aab51a914acee34b281c2090f8f908c197a51c01a3`

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