PDF malware analysis — malicious · bcd09c2f0bccbdbc

MALICIOUS

PDF

207.7 KB Created: 2021-07-21 00:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: f64ba4dabbe997b0d47195020d6c206d SHA-1: fd17594c1b9840497960a449c7c5bfd9b2e61697 SHA-256: bcd09c2f0bccbdbcd1231c620114b9fd821d837c064c9c2dd1773a8b55781726

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features numerous links pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for delivering a secondary payload or facilitating phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9800

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.
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
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://regalmotors-jp.com/js/upload/files/45449328763.pdf In PDF document text
- https://lawina-radom.pl/files/file/20361884042.pdfIn PDF document text
- http://learningkey.org/userfiles/kasujopaganabiwekisuvupal.pdfIn PDF document text
- https://exihomes.com/userfiles/files/ganuzitotipatexazekux.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67c6091c87---naxope.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092afdf01219---51156434414.pdfIn PDF document text
- https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0564002ff6---55893585506.pdfIn PDF document text
- http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/42641508310.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c78d249f5b8---vedona.pdfIn PDF document text
- http://simonhoirup.dk/userfiles/file/36697012243.pdfIn PDF document text
- http://anhuifan.com/upload_fck/file/2021-5-7/20210507073739610942.pdfIn PDF document text
- http://www.asap-recruitment.net/upload/file/xazevipisiwamefi.pdfIn PDF document text
- http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2f6d9eb39---40243008425.pdfIn PDF document text
- http://sotel-perm.ru/site/file/94111040602.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/b65fb657a101e1f1faa864816709151b/2375666348.pdfIn PDF document text
- https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/8a6cb06d5fe557cc83567c0569a14c8e/funewotijixizusixe.pdfIn PDF document text
- http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/92044211276.pdfIn PDF document text
- http://cesurmakina.com/userfiles/file/lerilewu.pdfIn PDF document text
- http://ohdiabo.net/images/ckeditor/files/gapal.pdfIn PDF document text
- http://kasargod.net/uploads/file/14840952716.pdfIn PDF document text
- https://driftwoodcc.com/userfiles/files/sigoluzeladenemegebe.pdfIn PDF document text
- http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084da804bedf---35364936360.pdfIn PDF document text
- https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/fca842f3b74f311c502ed40438ef8b91/13030095433.pdfIn PDF document text
- https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/ccc5b40b25c1ad110fd690a8a7a7b32c/nelekotifusebufobimi.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/bizel.pdfIn PDF document text
- https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/qtd0701nmaio4q9apc87203coe/58768836511.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=bobby+hill+i+don+t+know+youPDF 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_off0002d1af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2D1AF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0002e9c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E9C6	10368 bytes
SHA-256: `1a6b142ca81b5b63112e2b8f3b9ba3a64671c2f1f6bbce014954982012e2aeb6`
`font_02_sfnt_off00030124.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30124	18056 bytes
SHA-256: `819c336223ab7d58e0ac31a5c31b54f28856ad1eafc4643cfb4d29df0ff5ce60`

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