PDF malware analysis — malicious · 6c310e6129d7690f

MALICIOUS

PDF

116.7 KB Created: 2021-06-28 19:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 717c7a0376aa10925752654024846e45 SHA-1: 3b488b76fe4df1f942761a2648f54dfa3a7d0aaf SHA-256: 6c310e6129d7690ffb85b85195352736ef02980e9eec6d1335c3a83684415bbc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external URIs pointing to compromised WordPress installations and disposable domains, indicating a link farm designed to lure users to malicious sites. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9177

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://catamma.ru/uplcv?utm_term=clinch+the+sale PDF link annotation
- http://fmi.lu/userfiles/files/suderovunubofoso.pdfIn PDF document text
- https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/601dd1568c1456164fa2fea17f5aa5b9/xisarokun.pdfIn PDF document text
- http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d400c66255---47468330197.pdfIn PDF document text
- http://blackivy.pl/userfiles/file/gabexolexefuko.pdfIn PDF document text
- http://iltorg.ru/upload/file/babisuvagidigeva.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077849c5afab---71241246869.pdfIn PDF document text
- https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26da5ecfdd---73577372119.pdfIn PDF document text
- https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/386e5f6d6cfb9239d6b8c1fc6914993f/92789604831.pdfIn PDF document text
- http://www.anjhimayath.com/upload/file/54584956691.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04b05b623e---19439893161.pdfIn PDF document text
- http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/d1aae0113055f0bcbfd88e8818c68efd/55024412479.pdfIn PDF document text
- https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/f299652c7b2b74c03b815ac290eac08d/jikivobi.pdfIn PDF document text
- https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/af22ae4173316c6d107441789bd12475/63986657454.pdfIn PDF document text
- http://bright-inter.com/file_media/file_image/file/zolikedil.pdfIn PDF document text
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c174289740a---zepiboled.pdfIn PDF document text
- http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecec3db24d---77288188213.pdfIn PDF document text
- http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c960dfd6d07---32090015771.pdfIn PDF document text
- https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d421ff0650e---58504894675.pdfIn PDF document text
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/467ajgg0o9dm3occ8gs0ftorrq/64245614795.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607f073f1421c---26027579849.pdfIn PDF document text
- http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/f47ea2ec7d5ac390e3cc091476e85793/67133930564.pdfIn PDF document text
- http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a091d0a112---77226867542.pdfIn PDF document text
- https://ka-base.no/images_content/file/jojinax.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606faba61d071---59804387302.pdfIn PDF document text
- http://automozg.by/upload/editor/files/tugopixatuwuzawarumul.pdfIn PDF document text
- http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607de83d8d1fb---12913482445.pdfIn PDF document text
- http://fapannimario.it/userfiles/files/20770437497.pdfIn PDF document text
- https://almoheetmanpower.com/public_html/userfiles/file/54003730555.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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_006_off000197cb.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x197CB	23740 bytes
SHA-256: `be0be1bfed4115506327cc41f53d28a861aecf05322788d2712d2627cf89f9fc`
`font_00_sfnt_off00011855.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11855	25360 bytes
SHA-256: `b6d3097a24d76fd6ff0d7621505e4063bc8879e5805aa5ce29087cfb1aca9c89`
`font_01_sfnt_off000156cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x156CB	10140 bytes
SHA-256: `88f115473a5582e6ab0f9e3c8cfe74d276deb2b2723d0c44afc70c3b8fa3820c`
`font_02_sfnt_off00016d62.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16D62	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0001856f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1856F	5108 bytes
SHA-256: `8d88eaa7434f3572225eefb389129ef2c9c1b04243b6fe95266e25b6b8f70d8b`

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