PDF malware analysis — malicious · 5438c3875e6973d9

MALICIOUS

PDF

79.3 KB Created: 2021-09-02 19:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 79311ec984fb2444657d516e81342ece SHA-1: 8175b2047056388dd991617752ef71dd74c29af9 SHA-256: 5438c3875e6973d952881382030b59acfa001d77241d3564b0eac3fa7d52cbe3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of external URIs and link farms on potentially compromised CMS uploads suggests a distribution mechanism designed to lure unsuspecting users.

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 https://pixomot.ru/uplcv?utm_term=conveyor+belt+book+pdf PDF link annotation
- http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094fae01892b---xevugefogosuraxulokapek.pdfIn PDF document text
- http://mhinflatable.com/upload/file/fobepib.pdfIn PDF document text
- https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160949a1269a73---28297703544.pdfIn PDF document text
- http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/pifotat.pdfIn PDF document text
- https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/h99be1rva57dtsctm23lrgj647/fezalizo.pdfIn PDF document text
- http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/iom9k8d4g1fate66ka153kodeb/senuzakatetuvakube.pdfIn PDF document text
- http://steakclubhn.com/campannas/file/pafibujuj.pdfIn PDF document text
- http://baove24h.org/upload/files/78283132076.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcbd08d662---wajijudem.pdfIn PDF document text
- http://futuralagoparking.eu/userfiles/files/betazesiwamozoxakurimolem.pdfIn PDF document text
- https://vhssirimpanam.org/ckfinder/userfiles/files/1488655050.pdfIn PDF document text
- https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/38550e9f3a504dcc9b944e0662b1db31/nutogaz.pdfIn PDF document text
- https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/192dc8ad4ea67c2fc6ad1001323e1644/58704964975.pdfIn PDF document text
- https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/6rpv1ljhlo3dbftegao5kit1a3/fagofirasujowumivab.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160766673de509---88892249299.pdfIn PDF document text
- http://cuahuyhoang.com/media/ftp/file/2952420172.pdfIn PDF document text
- https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8b771956c---sezodifugebulifelu.pdfIn PDF document text
- https://aarhuskortet.dk/images/file/desalufulafutigirutano.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfd741027d---foranefidilinib.pdfIn PDF document text
- https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3ef3ab064---72762217201.pdfIn PDF document text
- https://alihuata.com/userfiles/file/67883844714.pdfIn PDF document text
- https://propiedades.net/ckfinder/userfiles/files/3606404314.pdfIn PDF document text
- http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcb05bb0f1---pulamafoto.pdfIn PDF document text
- https://daaeportrett.no/upload/file/wotamuwazabelika.pdfIn PDF document text
- https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608324bf20e66---fubamibagupibivafomuz.pdfIn PDF document text
- 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_off0000d619.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD619	16200 bytes
SHA-256: `550fde854cbf2b1066009f5e3d03f0380ab695491b10708db34e7d5a1156846c`
`font_01_sfnt_off0000fffe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFFE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011815.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11815	10512 bytes
SHA-256: `352c24f4775987dee55415069196c520d03e455bba8c63e876de4eabea736f3c`

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