PDF malware analysis — malicious · 01e53dc9d631856f

MALICIOUS

PDF

85.6 KB Created: 2021-06-26 10:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 790e64f218c6b75a46af434d14a76387 SHA-1: d5b8bcc891c62ee9c6bb94a369d6a68f686116a4 SHA-256: 01e53dc9d631856f3624bc5513948aba9c7137e48ae3b0427a3450f2598bee0f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm is designed to lead users to potentially harmful content, likely as part of a phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acaf4b3becf---10970260722.pdf In PDF document text
- http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/38045455044.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/53978916375.pdfIn PDF document text
- https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/cda4aa35361b3a730e8c36eef99de824/29107181694.pdfIn PDF document text
- https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/854q2bbq82ueh54dn39fkpqkm4/31276605833.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a499f91a3ee---dolonuvon.pdfIn PDF document text
- http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607448b6bf22d---1802221973.pdfIn PDF document text
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/tkd9iceqv1oaa29m4rs2rni94o/40541025431.pdfIn PDF document text
- http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085f64d2d87a---46454773930.pdfIn PDF document text
- https://ms01bet.net/contents//files/bobamuwegiwu.pdfIn PDF document text
- http://rasmesafar.net/basefile/basefiles/18435299207.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782a702a06f---62634683092.pdfIn PDF document text
- http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d9da4548e---35785052600.pdfIn PDF document text
- http://mfahk.com/upload/files/93915104894.pdfIn PDF document text
- http://modamoda.nl/uploads/pic_lib/file/bewalejorode.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ce074a7a---relir.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/26b9074dd13f5e87b6feca20313547ec/5673301387.pdfIn PDF document text
- http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f53361e71d---70126560396.pdfIn PDF document text
- https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/a9kff62mkqtum0e55aq28tadr2/96401329780.pdfIn PDF document text
- https://homeuu.biz/upload/ckeditor/pages//files/6833004690.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0ce7b48d3---ganonutubumalanax.pdfIn PDF document text
- http://shukokai-voves.fr/userfiles/file/wovokatufewul.pdfIn PDF document text
- https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/00e757b57f02687b1ef9ec38891e9e31/tifoximunutijokurubekage.pdfIn PDF document text
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/27315f9e28bb8d3f24f566e4d74e39ea/tukupimexalozag.pdfIn PDF document text
- https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/v16iosoj265jd5kl5jetqt8reo/todovos.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782d84998e8---70318347342.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=oral+language+and+readingPDF 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_off0000ef78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF78	10164 bytes
SHA-256: `41f22e995c3eed49cb10bbd2770fdd077dfaf3cbbc1ef6a79c3b0c9e0e5a5475`
`font_01_sfnt_off0001060e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1060E	16912 bytes
SHA-256: `4b80aa0a5f2c806b4948c03ef981dcfa166e487eecccae75700cc018c6e8de43`
`font_02_sfnt_off00013103.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13103	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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