PDF malware analysis — malicious · 2f0d47fa1e47d1ad

MALICIOUS

PDF

84.4 KB Created: 2021-09-01 01:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: bf1cacb78dd46e2eeb5f303fda7e7454 SHA-1: af6f75fc27523efc0700c3c804f6eb382b43b3b6 SHA-256: 2f0d47fa1e47d1ade7dbba59b971564ba4cbe99d236e04ffd34a23776fa74109

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farm heuristics suggests an attempt to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9957

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://yukkumpulgroup1.com/contents/files/zufizamixes.pdf In PDF document text
- https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/41455864a87b01ab4328f72da8e764fa/57036694209.pdfIn PDF document text
- https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71df53b985---zuwuwelisutubeno.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea3dcbfdee---90745767109.pdfIn PDF document text
- http://n2nnetworks.com/files/others/43555783841.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/40530382a3216f44138d3e5239746b33/mobarakunoposadi.pdfIn PDF document text
- https://sitycare.com/FCK-UserFiles/files/bibidaw.pdfIn PDF document text
- http://energo-market.ru/sadm_files/metafura.pdfIn PDF document text
- https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/e89afb9aa5477c329a835618399434cf/40063528554.pdfIn PDF document text
- https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16099bfb17c6c2---5609047052.pdfIn PDF document text
- http://cmtl.in/uploads/userfiles/file/file/toberedonosiwagipapin.pdfIn PDF document text
- http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104301718453283.pdfIn PDF document text
- https://www.elshandmadedesign.nl/ckfinder/userfiles/files/74343861055.pdfIn PDF document text
- http://softtox.com/new/userfiles/file/17903983521.pdfIn PDF document text
- https://camgloberealtor.com/userfiles/file/gavunebeb.pdfIn PDF document text
- http://calhi1977.com/clients/879053/File/4638303436.pdfIn PDF document text
- http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824ab5f2a84---11848128149.pdfIn PDF document text
- http://xboxheerlen.nl/userfiles/file/77761415773.pdfIn PDF document text
- https://binarbaidfabrication.com/public_html/userfiles/file/17506957516.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/05d04f8438643d7a0b8d5f67e0e65d65/wonipuvul.pdfIn PDF document text
- http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/64677856185.pdfIn PDF document text
- http://wasserburg.pl/userfiles/file/nulusaxid.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092d99b24516---91605128510.pdfIn PDF document text
- http://shinies.ru/img/lib/file/perelopilisijofupovuvusa.pdfIn PDF document text
- https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/4894c988426f00f8328fc230d93936f2/buviwopagimisasonopip.pdfIn PDF document text
- http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754734b1c10---21264008386.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=determine+whether+y+is+a+function+of+xPDF 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_off0000e02c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE02C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f83e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF83E	19060 bytes
SHA-256: `415e97e38c9af540649f3ae654022a2bf7f9dbf570a99c0fe32a26f77c8ccd60`
`font_02_sfnt_off000129cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129CC	10956 bytes
SHA-256: `bb9e20a3a81fabe0e4cc5b8e60dff6318e21fdc4950b92790c02dac937c75266`

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