PDF malware analysis — malicious · b6ede238fdde358f

MALICIOUS

PDF

89.2 KB Created: 2021-07-16 05:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 14d67dd5e564e2e40dc25b8903c7a716 SHA-1: 09eed1ca9e973e86c8c24b2bc15d76353626d96a SHA-256: b6ede238fdde358f88de52603de31d7276b2195b5a0e8bbcfcb56ead915c2130

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Several heuristics point to the document acting as a link farm, directing users to compromised CMS uploads and disposable hosting sites. These links likely serve as a lure to download further malicious content, potentially exploiting vulnerabilities for client execution.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efbc1131a6---pewinusomirexupu.pdf In PDF document text
- http://sanitaerprofi.ch/fckeditor/editor/images/file/58456161337.pdfIn PDF document text
- https://ajitcoatings.com/uploads/4596154338.pdfIn PDF document text
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/19f28bf01171becdced4cbdb7edcd542/79390088576.pdfIn PDF document text
- https://brothers-music.com/ckfinder/userfiles/files/kujewigilapi.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/f3004fc8773e5f3ee6c270580810da8d/xujusazatiwurezexi.pdfIn PDF document text
- https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c58aaea8c10---kujasadux.pdfIn PDF document text
- https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/kukkhhob3kq3q6jnfh1nhnrjre/fifijopozoxavoxevipuguxok.pdfIn PDF document text
- https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/e9e78d178b9f5579bf7b4d5b060e88ef/21980633649.pdfIn PDF document text
- http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb5c959017---xokejejosesijora.pdfIn PDF document text
- http://thermcom.cz/userfiles/file/97730345568.pdfIn PDF document text
- http://bluiettgriffinwilliams.org/clients/2/2a/2accc941c041fffeac9751862bb8fe41/File/rufepo.pdfIn PDF document text
- http://tinavaron.com/ckfinder/userfiles/files/fozizosibota.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/ke6avn8g6f9nn97gs5pukho7j0/winasamiv.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/6b145a877a03874dc263eadfed76995f/xuzosojunosagexofi.pdfIn PDF document text
- https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889d6ce4b4a---91424722122.pdfIn PDF document text
- https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160819ae8984f7---10566069017.pdfIn PDF document text
- http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c55dfc9592e---fivibiwaj.pdfIn PDF document text
- http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876e716b827---kitezuledonafifale.pdfIn PDF document text
- http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075dacf8313f---nofixopa.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f8ad8ce18---91617791928.pdfIn PDF document text
- https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b250d69a14---nobijixokopevatok.pdfIn PDF document text
- https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/f55757b297f5c27a1048a01f1c92cb5e/75276635483.pdfIn PDF document text
- http://eurekaelearning.com/upload/news/file/25113656159.pdfIn PDF document text
- https://colakcivi.com/userfiles/file/19818366024.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=download+clownfish+voice+changer+pcPDF 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_off0000f895.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF895	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000110ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110AC	10952 bytes
SHA-256: `9b5e2d328d626736bb524d570374ad431ea57039d3904370623e346ff85dd04a`
`font_02_sfnt_off000129cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129CF	17224 bytes
SHA-256: `2656df601c6e63e5a633446aaae6632fd6b65266f3e72a7ce4d67a0be0258232`

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