PDF malware analysis — malicious · 40a10f77c5ae76ca

MALICIOUS

PDF

93.4 KB Created: 2021-09-02 02:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 4ae115e94152b367fe024151f314d3c3 SHA-1: 3676f83bd6ffe6bbb0421d0751b7f70e1954b794 SHA-256: 40a10f77c5ae76ca73efa6494fa9f14ddf20c934c1bc32bfc2111030db918f77

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or other suspicious domains, indicating a link farm or SEO poisoning attack. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing or malware-hosting sites. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 0.9653

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://tgtech-auto.com/userfiles/file/89546936961.pdf In PDF document text
- http://progfin.pl/userfiles/file/43838545277.pdfIn PDF document text
- https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/qpc14m1b5r1peq91vv9n6vco1a/83459384605.pdfIn PDF document text
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610de62139245---46883414755.pdfIn PDF document text
- https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1bb6931fc---15118967015.pdfIn PDF document text
- https://cihangirhotel.com/upload/ckfinder/files/50837924731.pdfIn PDF document text
- https://hijaulumut.com/contents//files/26339876254.pdfIn PDF document text
- https://temahr.hr/files/nevuxe.pdfIn PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/fefae6d195435ddc19558354a22236b5/vogiletor.pdfIn PDF document text
- https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/1eee4e3a30b0090d26b0321715026754/14334361588.pdfIn PDF document text
- https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b41fdb5c6dc5b0257a2a567d879bb76a/demoxopipavivilekuwiz.pdfIn PDF document text
- http://wingmanplanningdemo.com/userfiles/files/21573839509.pdfIn PDF document text
- http://thegroverestaurantnj.com/userfiles/files/jebipakogosebezakole.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/804faf3e6f066eb87e7b03f82154ebf6/wipawefe.pdfIn PDF document text
- https://aimhc.com/userfiles/file/31836376942.pdfIn PDF document text
- https://akproauto.com/nbloom/fckuploads/file/21483717148.pdfIn PDF document text
- http://longarmquiltacademy.net/fckeditor/userfiles/file/37202884022.pdfIn PDF document text
- https://ayurvedaemart.com/uploads/file/gubolujuxovimukonunet.pdfIn PDF document text
- https://alshaabcoop.com/userfiles/file/60958086092.pdfIn PDF document text
- http://bestbelly.org/content/files/files/46663591661.pdfIn PDF document text
- http://crisismobile.com/ckfinder/userfiles/files/6980175414.pdfIn PDF document text
- https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/131e2d77a1fea38e20a470ef8a360666/32544502989.pdfIn PDF document text
- http://hjtech.org/admin/upfile/file/wumilu.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878137a96d8---44278470014.pdfIn PDF document text
- https://michelbarbot.com/upload/files/28851796985.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=dav+class+7+english+practice+book+solutions+pdfPDF link annotation
- https://mediaget.com/userfiles/files/vabuxoxulidoxasez.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ebf8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBF8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010409.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10409	17124 bytes
SHA-256: `b2cab35c314ded2a54b2d95ffed5a50c01d17e1a2b81fcd261c13bde36196090`
`font_02_sfnt_off00011d1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D1F	11348 bytes
SHA-256: `e45dfe87ec2a8fa76ea9e098a525456a26d3509a09a3d9e59f0ed51e3a5fa45b`
`font_03_sfnt_off0001376c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1376C	17944 bytes
SHA-256: `2480a012e49a7c151603ee9a70a8052a921600d36642ffdf4ecb89df9243854c`

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