PDF malware analysis — malicious · abd117cc3c4e0eaa

MALICIOUS

PDF

76.2 KB Created: 2021-09-05 07:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 6ad16b366d052cfe1d3420263acec58d SHA-1: 51103df508586d282731d6aaebaff08496ff87e3 SHA-256: abd117cc3c4e0eaa83f58d156535af5cf998e9b00f0b4b5024b0fe6450c82e29

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The primary attack pattern involves luring users to click on these links, likely leading to further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.7380

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://oniceh.ru/uplcv?utm_term=maariful+hadith+urdu+pdf PDF link annotation
- http://relatives-united.com/clients/75139/File/rowuweridapezanivu.pdfIn PDF document text
- https://dadrarad.ro/userfiles/file/37469593876.pdfIn PDF document text
- https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/5denfphul5kke49brcjmb7na37/patebaxilidatap.pdfIn PDF document text
- http://alarcon-v.com/editor_upload_image/file/bugozegafi.pdfIn PDF document text
- http://15441707.com/data/board/file/20210803154828.pdfIn PDF document text
- https://alasclub.gr/neuro/ckfinder/userfiles/files/dulebapalilofupurozim.pdfIn PDF document text
- http://kool-house.com/upload/editor/file/38816013235.pdfIn PDF document text
- http://lunaleo.pl/userfiles/file/82620824729.pdfIn PDF document text
- https://habibitours.net/ckfinder/userfiles/files/70816626009.pdfIn PDF document text
- http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/xesawunesenimubisabojotat.pdfIn PDF document text
- http://pixel-pro.ru/upload/file/50356215118.pdfIn PDF document text
- http://nicenpos.com/userData/board/file/winolapabiboturuxini.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a67f48649a5---xoboken.pdfIn PDF document text
- https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/7e7nrcg4v4m2f2t5q0rankbp86/litodigar.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a02f579b75396d76605230edd3e63392/jatejow.pdfIn PDF document text
- http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad7ebbeb84---zotore.pdfIn PDF document text
- http://bowlingkillers.com/imgdb/files/julugejawurodu.pdfIn PDF document text
- http://wami.cc/data/files/gejejiwafawasa.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743acac74ba---96434183650.pdfIn PDF document text
- http://healthywithhart.com/res/file/61462565424.pdfIn PDF document text
- https://adeptos.clevercloud.pt/images/items/files/77350678061.pdfIn PDF document text
- http://museodegliarazzimarsala.com/userfiles/files/ziwapaviserus.pdfIn PDF document text
- https://serviceservice.eu/userfiles/file/80708283662.pdfIn 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_off0000ca1d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA1D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e234.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE234	10164 bytes
SHA-256: `b22579e39a8e4304a3144527bab5cf75ab5a38accf234814cf43ce763a4ba365`
`font_02_sfnt_off0000f8f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8F7	20636 bytes
SHA-256: `ef9b5c4a4d2f98caaffa8e981bfd806fd4cd3cfcb382e7f6cd2f7227267725a6`

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