PDF malware analysis — malicious · 4c202241ec6e7132

MALICIOUS

PDF

86.2 KB Created: 2021-07-02 20:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 106af0c7274a6a83a6fde37ea3b13b35 SHA-1: 1ede76635bedcb04a3d6bdefd3eafeb7ab2e1dd7 SHA-256: 4c202241ec6e7132ebe5c36a5be0877400913499b7c52fe9bb4b6e2e025b7e0b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or conduct phishing campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/j6ehvaj4uavv4qn1k005rakmvj/vepolesefis.pdf In PDF document text
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/tf8lc91mq2am6s8i8mpc4h193s/71746380041.pdfIn PDF document text
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/c58ad3a30e5251a07068eeb2a581270f/2800586180.pdfIn PDF document text
- https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fa2254ad8---xumosub.pdfIn PDF document text
- http://vankouwenenmastop.nl/UserFiles/file/16963043816.pdfIn PDF document text
- https://apoiotelecom.com/imagens/img_fckeditor/file/14751959063.pdfIn PDF document text
- http://hoangle.vn/uploads/userfiles/file/zalefipase.pdfIn PDF document text
- http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4539b8a68---wefuruxo.pdfIn PDF document text
- https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608966ceabe7e---85213787694.pdfIn PDF document text
- http://ibconsulting.it/userfiles/files/sejodo.pdfIn PDF document text
- https://towa-aaa.jp/userfiles/file/49497499473.pdfIn PDF document text
- http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082ae60c1599---20958249219.pdfIn PDF document text
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/utaj6po3iqc72svjo4p4tb1e44/kavenivinanu.pdfIn PDF document text
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a68ed1a505f---lesokatezavojaboxuxomeko.pdfIn PDF document text
- http://abwingssuffolk1.com/uploads/files/jifox.pdfIn PDF document text
- http://www.vegagastro.pl/upload/file/16707796624.pdfIn PDF document text
- http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b125497575---113552764.pdfIn PDF document text
- http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160941d2dc9c82---39712314047.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/3quml9pjpmhvoo8djbhht7jvj7/37655686668.pdfIn PDF document text
- http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c1904177b---xiwafureja.pdfIn PDF document text
- http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/xonegumidin.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4dc9cf686---2252508310.pdfIn PDF document text
- http://chinajessie.com/seadata/data/uploads/img/file/162421184354.pdfIn PDF document text
- https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/f909cec1a6c3f50cf3bb63a065e3944f/43534199626.pdfIn PDF document text
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908860b32e2---kisovudigapotizakelovo.pdfIn PDF document text
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1e4eb9755---2754030791.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608610a636f0e---25074312294.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=is+a+diamond+a+compound+element+or+mixturePDF 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_off0000ef27.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF27	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010739.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10739	16572 bytes
SHA-256: `6e4efb90a81e0afaec2f7bcbd2b42b47b4d4ee90c5b0f52b5d464afedde05057`
`font_02_sfnt_off00013222.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13222	10828 bytes
SHA-256: `49f9631435aaefe0570a3e9900a373383508eec50f801d631af5a96e203c8e5b`

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