PDF malware analysis — malicious · 666250e34afd82b1

MALICIOUS

PDF

91.2 KB Created: 2021-08-11 21:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: cae56663b16f69c411bacb5d2d448d93 SHA-1: 8771080ba4fe5987efec0868ac1ea71a04b11f92 SHA-256: 666250e34afd82b1c22e254b1709267d011c2cbfc7c6be667a0e6f3fa31b0f33

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host and distribute malicious files. The presence of multiple URLs on compromised domains indicates a tactic to evade detection and leverage existing infrastructure for distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ef13e9585---37935968448.pdf In PDF document text
- https://bikeid.net/ckfinder/userfiles/files/10379508803.pdfIn PDF document text
- http://marinapogon.pl/upload/file/17083784753.pdfIn PDF document text
- http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160755cd9d60b1---54435219660.pdfIn PDF document text
- https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0bdc425ce---10198618650.pdfIn PDF document text
- http://thunderstar.cn/userfiles/file/20210519100621810677956.pdfIn PDF document text
- http://chrislahoda.ca/userfiles/file/97610524722.pdfIn PDF document text
- https://plasy.com/uploads/file/62587075713.pdfIn PDF document text
- http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5d6d1ec83---zenew.pdfIn PDF document text
- http://stembridgefamilyreunion.com/clients/0/0d/0db03be1a97f3028174cafb645c8c91f/File/merinuvebafapa.pdfIn PDF document text
- http://purofirstli.net/userfiles/file/pifijip.pdfIn PDF document text
- https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878cd4a4749---18593396509.pdfIn PDF document text
- http://realestatespoznan.com/uploads/91540559386.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a032a934de3---xirozemupujusolil.pdfIn PDF document text
- https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084daa3a5ee1---walajuwubavimovufitoxob.pdfIn PDF document text
- http://sicilyontable.it/userfiles/files/gilutowojopuzonizebaf.pdfIn PDF document text
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90a40d0b12---jopoponisaretudoniluxokon.pdfIn PDF document text
- https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/773dd95e72a8f9f8d633762b96f98880/70927825770.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071803702026---kezawotafalovimi.pdfIn PDF document text
- http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/terer.pdfIn PDF document text
- https://atcotourismtravel.com/userfiles/file/47135786341.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42dd296dcb---13614452214.pdfIn PDF document text
- https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/1e06komte0tfbs4le0mneqmer2/fodofurapileta.pdfIn PDF document text
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cd80451ac---voluwodalijubivujetikiv.pdfIn PDF document text
- https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/db079c894a383e105630120dc5145f5b/46617081914.pdfIn PDF document text
- http://ackerviewguesthouse.com/userfiles/file/wukurel.pdfIn PDF document text
- http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f2403b159---92840238675.pdfIn PDF document text
- https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16113ae72f242d---polilowixumis.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=wwe+2k+13+iso+file+downloadPDF 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_off0000fee0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEE0	17172 bytes
SHA-256: `e170e4910634b3ec00e8f219dee458c1c7988fed8d54d69c9f996b135e95a5d6`
`font_01_sfnt_off00012bba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BBA	10664 bytes
SHA-256: `f50c80eb9de9d0444898b383b8bb8437d398b0f56660119f8bce2af0c652f5a4`
`font_02_sfnt_off00014472.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14472	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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