PDF malware analysis — malicious · 38388d8364931056

MALICIOUS

PDF

88.2 KB Created: 2021-07-24 05:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 59a7e591621c2fc56fb6594103f4b804 SHA-1: a7b8a94f3294e2a099e6484e8d2a644a06fa9d21 SHA-256: 38388d8364931056f8bd642e0ff2ce6323693fbb5bba2931ffa5a0af1fadaa1c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites hosting further PDF files. The primary purpose seems to be to lure users to malicious content, likely for phishing or to download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://rotang.net/userfiles/file/3467555786.pdf In PDF document text
- http://kulturazebrak.cz/userfiles/59328920102.pdfIn PDF document text
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609638ce063aa---kofenidotigunanir.pdfIn PDF document text
- https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/1f4af8c95fb4aae186663b1804f917d0/85873201429.pdfIn PDF document text
- https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855ebeca67c---20088976844.pdfIn PDF document text
- http://www.sictombbi.fr/ckfinder/userfiles/files/52300429783.pdfIn PDF document text
- http://afghansolar.com/userfiles/file/32413987431.pdfIn PDF document text
- https://goooinggroup.com/userfiles/files/20210716_025208.pdfIn PDF document text
- http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608340dd0d7bc---wuzur.pdfIn PDF document text
- https://oteaexpert.fr/cite_imgs/file/nedibegilawij.pdfIn PDF document text
- http://www.horakgolf.cz/ckfinder/userfiles/files/20331084548.pdfIn PDF document text
- http://wo-kop.pl/userfiles/file/midexurulofoj.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160878368f2fa8---xafufotirabuvogoterijina.pdfIn PDF document text
- https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/c310f03ca3859c2c1dde9dc933ec96d7/29565268113.pdfIn PDF document text
- https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/890d00b818e927a44c5dfd362897a4bb/lagoniwipudazefafot.pdfIn PDF document text
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757933bc249---vunowegumitexoger.pdfIn PDF document text
- http://bbpcosmetics.com/admin/upFiles/2021-5/file/takerotajelepezifinejuse.pdfIn PDF document text
- http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/c626c0ce46bb866bccbf74989befa687/zazutagowenanunol.pdfIn PDF document text
- http://screen.by/images/file/wizupedenodakoxe.pdfIn PDF document text
- http://china-zub.ru/userfiles/file/wuruwizebojulevovumogegab.pdfIn PDF document text
- https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/dhcuuen1ppotiqsbamhflnpggm/85722323949.pdfIn PDF document text
- https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/a0e853a937af911dd289794389224d05/tagapetixiwusumir.pdfIn PDF document text
- http://stylekd.ru/files/36605414255.pdfIn PDF document text
- https://limsurempat.com/contents//files/nukusilomuzipefexesefesa.pdfIn PDF document text
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cc9d7481f---57801436122.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b57a72cb6---45833646886.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082fba692016---goxidugurufosomaxukubip.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=janaki+sriram+song+download+mp3PDF 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_off0000f4a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4A2	10844 bytes
SHA-256: `b23443f1c285d3fb5c32fc9dddcd82d24f24857aaf4b2a9a749fc17c7b49e8e0`
`font_01_sfnt_off00010d76.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D76	17096 bytes
SHA-256: `b69903450b923a278c36b3eb3a6bc3b6b3cc809125cde46d7f70da77036efa2e`
`font_02_sfnt_off00013a48.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A48	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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