PDF malware analysis — malicious · 8001b3b218c6d761

MALICIOUS

PDF

77.6 KB Created: 2021-09-16 08:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: d76b0f70dd964f01c4f611fc3c379289 SHA-1: d3b85aec70f34c7f8ee65cc940ac447a050f833d SHA-256: 8001b3b218c6d7612358d0197038017688a48208c12dbfc0a649a485be0af18c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs pointing to various websites, some of which are hosted on compromised WordPress upload directories or disposable domains. The presence of 'utm_term' parameters suggests an attempt to track user interactions, common in phishing or malicious redirection schemes.

Machine Learning

Nyx PDF Classifier malicious score 0.7209

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://allytemp.ru/uplcv?utm_term=download+mp3+mp4 PDF link annotation
- https://aymexco.ro/ckfinder/userfiles/files/mebekuxuzowa.pdfIn PDF document text
- https://r4binsh4h9-att.com/contents/files/gerikanelurod.pdfIn PDF document text
- https://callmarkinvestments.com/callmark/files/sigovobidosewedimaruti.pdfIn PDF document text
- https://tims.ro/ckfinder/userfiles/files/47485020078.pdfIn PDF document text
- https://libertyrealestate.in/ckfinder/userfiles/files/78496832520.pdfIn PDF document text
- https://szalkasszorutacskok.hu/app/webroot/files/content/files/dizafetulubapanobesoredig.pdfIn PDF document text
- https://betenagro.com/sites/default/files/file/dolalunibibebe.pdfIn PDF document text
- https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bdee8eb04---motudoxaweda.pdfIn PDF document text
- http://koszyczarek.pl/userfiles/file/24804052068.pdfIn PDF document text
- https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/f6a4298262130c792baaff97c6bc5dc5/53583780575.pdfIn PDF document text
- http://digivideos.net/ckfinder/userfiles/files/28347988133.pdfIn PDF document text
- https://havilahbuilders.com/userfiles/file/letaporadapizamo.pdfIn PDF document text
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/24cb1f15fb04116098b760bc79d69bac/noden.pdfIn PDF document text
- https://vas-vill.hu/userfiles/file/53982029355.pdfIn PDF document text
- https://skatrip.com/basefile/skatripcom/files/mirorak.pdfIn PDF document text
- http://newgatedesign.com/Images_upload/files/vifimenirozigulej.pdfIn PDF document text
- http://agenziaimmobiliarecannavo.eu/userfiles/files/gevigu.pdfIn PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8fa0e0cc1---45040315277.pdfIn PDF document text
- http://sinoorchids.com/image/file/likekuvaxidazajatugijuwu.pdfIn PDF document text
- https://uzunlarpeynir.com/dursun/upload/files/84572890004.pdfIn PDF document text
- http://kondicionery-domodedovo.ru/upload_picture/file/62632026676.pdfIn PDF document text
- http://avtokit116.ru/!upload/files/26815082531.pdfIn PDF document text
- http://chiesamadremarsala.eu/userfiles/files/35265488510.pdfIn 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_off0000d79b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD79B	17332 bytes
SHA-256: `e595bbe3cdddb8dc98ceca2967876d0209ba8e2ba8f27602045b5abd1dfdcc42`
`font_01_sfnt_off0001042d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1042D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011c44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C44	10300 bytes
SHA-256: `4e067e82c77c9cfb89ee346897fc9e934fe9ce524d27419e08923d824facc0ba`

Open this report in the interactive analyzer, or submit your own file for analysis.