PDF malware analysis — malicious · b628d2c3585c4e2d

MALICIOUS

PDF

83.1 KB Created: 2021-07-13 09:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 0366aca522fbfbc52abb5743124675b9 SHA-1: a032129f2a7a35bfb686148181ab445bcebfa0f7 SHA-256: b628d2c3585c4e2d6fd35a15581654ce75aa5942ea6dd86957ab42ae6e65a630

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external URIs and links to compromised CMS uploads, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or malware distribution, leveraging the 'Spearphishing Attachment' technique.

Machine Learning

Nyx PDF Classifier malicious score 0.9783

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://oniceh.ru/uplcv?utm_term=heart+touching+lines+in+bengali PDF link annotation
- http://donaldbermanmaimonidesgolf2021.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/72964672132.pdfIn PDF document text
- https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b991140c8---bewalewibidokakufepusewag.pdfIn PDF document text
- http://ankurgroups.com/userfiles/file/felowomalizidisox.pdfIn PDF document text
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/10eb064973013c2ac087230232e1dd79/nawigebarusaveno.pdfIn PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/55b05c1dbe41900534ddffee60528e31/68450090760.pdfIn PDF document text
- http://kuhomania.ru/ckfinder/userfiles/files/lubozamosadugagimi.pdfIn PDF document text
- https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/54b5f0081b373209818ca1cb98ddb36e/lujixatedaguwufupajanewa.pdfIn PDF document text
- https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/6301c7c965ebe33c42de97e41f9874c7/88413643177.pdfIn PDF document text
- https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/u9f8ff4564af9k0vq8nnkn1kbg/winikedenujepas.pdfIn PDF document text
- http://curry-box-deluxe.de/userfiles/file/vabajibuxi.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9fc01e4b55---19946466277.pdfIn PDF document text
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16085eea4854bd---68824306444.pdfIn PDF document text
- https://grouptm2.com/contents//files/tosopef.pdfIn PDF document text
- https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16089809491498---32741676621.pdfIn PDF document text
- http://amoy-art.com/Upload/file/gokixo.pdfIn PDF document text
- http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608493377170b---radegexuximekekinake.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/8acca2021014eebd5c3120736ab038b9/29076195723.pdfIn PDF document text
- http://hzzxtl.com/UploadFile/file/20210703104733891.pdfIn PDF document text
- http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5cae90f03---43793494190.pdfIn PDF document text
- https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/lakmv0fb2idmgi828p5loup035/berolidivozor.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd2e69163a---fegeke.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9fc665ab3---diwevawedavajivu.pdfIn PDF document text
- https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a17322ba871---viwipirulux.pdfIn PDF document text
- http://pytextiles.com/userfiles/file/tanisewutavuzimoki.pdfIn PDF document text
- http://alpha-cp.com/userfiles/file/sinumeni.pdfIn PDF document text
- http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xenuparolezitugoxi.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d7a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7A1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000efb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFB8	10740 bytes
SHA-256: `75ab0d4c0e5e38c017fa48e476980733216a58dab73da8c7ab65ce8383c6efb3`
`font_02_sfnt_off00010846.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10846	2308 bytes
SHA-256: `5639dfdb0b14b59c7c7dc742c2d77c44b6ab17e23ab866f62574283f933a8c9e`
`font_03_sfnt_off0001126a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1126A	16500 bytes
SHA-256: `ffe6699a243b35c071fdca2e627b86f1c1baabab090fbe0ffe5a269249cd97dc`

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