PDF malware analysis — malicious · 1b64f1e2d22e0e8b

MALICIOUS

PDF

86.1 KB Created: 2021-07-07 21:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: d7de08b45327a65e295c7af34de392f3 SHA-1: 8978f1f3c17145ce9102b5a2ce4f498af21f4b74 SHA-256: 1b64f1e2d22e0e8b447497b28048257d15ac0e3b6b081f04583182b4fbc76d7a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of these links suggests an attempt to lure users to malicious sites for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://infrive.ru/uplcv?utm_term=oregon+commercial+drivers+license+manual PDF link annotation
- http://agroanaliz.by/upload/editor/files/52082472209.pdfIn PDF document text
- https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/iiuahssrc5q1k402fhsggvr046/lawadi.pdfIn PDF document text
- http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608100c5f1125---99737461494.pdfIn PDF document text
- http://alrabbancapital.com/file/files/5188795053.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/d3663bb2af90f5e36f6fe3afb46c1bb6/57510621379.pdfIn PDF document text
- http://bhk-aindling.com/userfiles/files/podofisezapotekenoxukodud.pdfIn PDF document text
- https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b87bd6243c---binisikan.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/754eb6072b547c9ed7f59ebab7fe9f0d/87601881538.pdfIn PDF document text
- https://asiarsolutions.com/userfiles/file/disomibopakozigede.pdfIn PDF document text
- https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/f09b0eb63f593de8ec849647b2a83393/98482892142.pdfIn PDF document text
- https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bca6f7b02e---lotekeme.pdfIn PDF document text
- https://alice-immo.com/userfiles/file/87797204123.pdfIn PDF document text
- https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b9ce4e0c---7766530156.pdfIn PDF document text
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d6bedce2ea7---14374186576.pdfIn PDF document text
- https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/e3ff0c594c4c0a93993ac59a3f6dc17c/40402004513.pdfIn PDF document text
- http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/rbrdqlh3of5dlkgavrukhpbg06/ribibetofaxoxo.pdfIn PDF document text
- https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a93808d2a88---jezasawe.pdfIn PDF document text
- http://ginzaoakland.com/uploads/files/81239368098.pdfIn PDF document text
- https://pirkitpadangas.lt/ckfinder/userfiles/files/46989628646.pdfIn PDF document text
- http://biosafety.biz/ckfinder/userfiles/files/zulevitufapoj.pdfIn PDF document text
- http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b753e80959---47810186371.pdfIn PDF document text
- http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/2886be4ea11010622904314a0049862c/67594099097.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16098751b5bb37---wudazubuxepewut.pdfIn PDF document text
- https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609463e89ef99---73705766882.pdfIn PDF document text
- http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac56687560c---87527793778.pdfIn PDF document text
- https://0900107678.com/upload/file/famisidarilagor.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_off0000eec0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEC0	16640 bytes
SHA-256: `b5c22602a5c0f75fa96bb1336236648ac8359243426f1a36e135a7306654b8a2`
`font_01_sfnt_off000119e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119E4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000131fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x131FB	10804 bytes
SHA-256: `5b8f0a48ca2c041c2f27c4f961cc406a2982aa51431941a48392156ff537cbe8`

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