PDF malware analysis — malicious · 57f199e3d1d0d69f

MALICIOUS

PDF

77.9 KB Created: 2021-09-19 00:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25

MD5: 9b288638d8af47aa5e8575f695289baf SHA-1: 215c7617e09c8a88e77f933282185f2739082a58 SHA-256: 57f199e3d1d0d69f01e44bbd1352667c819a1d1fa901137e4a7a5794b281243c

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier suspicious score 0.4329

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5056c9c5f314aaf83ac9fc506045a588/20934156006.pdf In PDF document text
- http://savitaco.com/uploads/images/files/fipiwaxiwekumuxa.pdfIn PDF document text
- http://archifolder.com/userfiles/files/bojugizumofotixaxutamusaz.pdfIn PDF document text
- http://flapboxes.com/userfiles/files/vafivik.pdfIn PDF document text
- https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/ebb507d3a37f9cd8c93d52b9e2760fb5/62891425541.pdfIn PDF document text
- http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1613478dc62b13---sopen.pdfIn PDF document text
- http://gpszone.hu/upload/userfiles/file/88385502404.pdfIn PDF document text
- http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/043c471353cdcd03994d232805a62ff7/jobavudilakadilekuboza.pdfIn PDF document text
- https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/48a61e2c3a7b02fcb7a953a128344231/45207275972.pdfIn PDF document text
- https://parklanehotel.asia/userfiles/file/sawajisunavafilolu.pdfIn PDF document text
- https://korzo-galeria.hu/files/file/29668373107.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614654bdc6709---94575910652.pdfIn PDF document text
- http://megatex-plast.ru/pub/file/18953866904.pdfIn PDF document text
- http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/gaxuvufepalozute.pdfIn PDF document text
- http://stsmcc.org/www/js/ckfinder/userfiles/files/65507881156.pdfIn PDF document text
- http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/59751258321.pdfIn PDF document text
- http://phutungtdc.com/upload/files/43908903688.pdfIn PDF document text
- http://alphasigmaoverseas.com/userfiles/file/51575028476.pdfIn PDF document text
- https://rosedreamholidayhomes.com/ckfinder/userfiles/files/34915899577.pdfIn PDF document text
- http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/hsocp3i2ql89lm6u3agfscfns8/pofuruwuwivujuzokonowenib.pdfIn PDF document text
- http://prunay-en-yvelines.fr/ckfinder/userfiles/files/49579635240.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/0c926c6dd34608f1df696e28a5611ec0/nimovifuzuwegelewukel.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/qepni0sr8kevqfq598jbglhm38/24206223170.pdfIn PDF document text
- https://m-audio.vn/img-m-audio/files/45230964055.pdfIn PDF document text
- https://tongdaidoanhnghiep.com/app/webroot/upload/files/nekugaxanezutitimovitu.pdfIn PDF document text
- https://samarthanamparisara.org/apadmin/uploads/userfiles/files/keposetu.pdfIn PDF document text
- http://ilovehikari.com/uploads/files/89865030470.pdfIn PDF document text
- http://klwas.org/userfiles/images/file/30302631719.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=download+thor+the+dark+world+apkPDF link annotation
- 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_off0000d82f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD82F	10408 bytes
SHA-256: `b69f7fc5fa54e78b11cc706e3496a8b1a9e7debac0a3faf9f7a12d6d5fac16b0`
`font_01_sfnt_off0000efb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000107c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107C7	16664 bytes
SHA-256: `739721ecdbdc216dee5dafbedfb1928816d34c6baf94e67c20d069ac6f33750b`

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