PDF malware analysis — malicious · 9c2043f1a6e5ab21

MALICIOUS

PDF

78.3 KB Created: 2021-09-07 03:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: d1dbf8e48dd46b3b128abdee53ca66e6 SHA-1: 77fd0fccc82bff455cbdd71c084dd70ea6ad5573 SHA-256: 9c2043f1a6e5ab2158812a64d4d2537bb632e1fe2825015361479cc0595ad8c2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://laborke.ru/uplcv?utm_term=manual+del+propietario+dodge+durango+2009 PDF link annotation
- http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbc587518a---932648586.pdfIn PDF document text
- https://invest.pl/userfiles/file/77087655418.pdfIn PDF document text
- http://lamekatus.ee/uploads/ckeditor/files/76691153508.pdfIn PDF document text
- https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/c42f6574b2fc64f4c079e2d828c1b2eb/podixunotodamenuwosuxo.pdfIn PDF document text
- http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edfc6a78670---41985423057.pdfIn PDF document text
- https://penzion-palice.cz/content/rusiwenigaxilojopivuz.pdfIn PDF document text
- http://s2ipower.com/survey/userfiles/files/60797730969.pdfIn PDF document text
- https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/905197245db580a31b7fc83f81e8c2a8/21598325797.pdfIn PDF document text
- https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/886a8d697561cfab844b72ab76d24214/jobatenizokezejuxomaf.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e429ba712---1580630115.pdfIn PDF document text
- http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/vutilegizakileledijekifix.pdfIn PDF document text
- http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/m8eskorj3ka61mhq2bal9nsr32/69190393935.pdfIn PDF document text
- https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf0e6aaacc---48537983884.pdfIn PDF document text
- https://kalyna.ua/sites/default/files/userfiles/file/46853950773.pdfIn PDF document text
- http://masterref.ru/editorfiles/file/kilov.pdfIn PDF document text
- http://getvisa.ru/images/File/94753134837.pdfIn PDF document text
- http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/r5m54okiu5b89mnvcgtl17sqm7/67117851682.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c88271c4e1---warevekabutazefekesiru.pdfIn PDF document text
- https://dewalt-naradi.cz/media/upload/editor/file/vepugaviwaxigamexibogawig.pdfIn PDF document text
- http://grupposcorcia.it/userfiles/files/9386776129.pdfIn PDF document text
- http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e5374092f6---zatobolobo.pdfIn PDF document text
- http://hotelniagararimini.eu/userfiles/files/55538779067.pdfIn PDF document text
- http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e94a63546fd---togelamimutelapomo.pdfIn PDF document text
- https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/5817ea8c083d1f50204097950b9089e8/vavapabobemerut.pdfIn PDF document text
- https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/3b08c71185ce1c3fe0ecdb6044b63aae/12046845308.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_off0000cb4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB4E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e360.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE360	17912 bytes
SHA-256: `fb1ecdc8d0d0a321b36df63bbc19ca95c6e564f73d5c156348235e9a2e46f6a0`
`font_02_sfnt_off0001122b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1122B	10904 bytes
SHA-256: `22d207aa3597a88ebb60329b8f513e953fd1260dd4875abfcd248d5c45f9fcb5`

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