PDF malware analysis — malicious · b60717820357419f

MALICIOUS

PDF

80.4 KB Created: 2021-09-12 11:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: bcc6902d2859b26e7ebdeaf3311f5135 SHA-1: 2fac1c35a098600bb612a94eb610a9ffbf726690 SHA-256: b60717820357419fc51a1393d7485fac34612ac26704f8fb0fc242282c23e787

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, many of which are hosted on disposable domains or use URL shorteners, indicating a phishing or malicious download lure. The presence of ClamAV detection and ML classification further supports its malicious nature. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the embedded URLs strongly suggest a phishing attempt to trick users into downloading malware or visiting malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://allytemp.ru/uplcv?utm_term=pixel+gun+3d+old+version+download PDF link annotation
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16137facfae7e1---98091789567.pdfIn PDF document text
- http://fabiocaronearchitetto.com/userfiles/files/41469823975.pdfIn PDF document text
- https://shinko-tw.com/UserFiles/file/56551285048.pdfIn PDF document text
- http://betonkeritesek.eu/Content/files/70355637618.pdfIn PDF document text
- https://bibliotheque-des-arts.com/ckfinder/userfiles/files/duwom.pdfIn PDF document text
- http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/161364a901ddfb---19390791707.pdfIn PDF document text
- http://umffz21.ru/admin/ckfinder/userfiles/files/gufugifolox.pdfIn PDF document text
- https://artenika.pl/fck/file/kirusixirereb.pdfIn PDF document text
- https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/aba80e7f0620197aae0d4ac088291d99/86820223520.pdfIn PDF document text
- http://anoh.net/pds/userfiles/files/zenozilofulakitumafu.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/95164460110.pdfIn PDF document text
- https://tigaintan.com/contents/files/lutipebesuviw.pdfIn PDF document text
- https://www.agencesramos.com/ckfinder/userfiles/files/46989177013.pdfIn PDF document text
- http://munsusa.org/userfiles/file/20210902140507.pdfIn PDF document text
- http://formpart.com/upload/ckfinder/files/89611097359.pdfIn PDF document text
- http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161350b69270f0---96928113070.pdfIn PDF document text
- http://angelescare.com/userfiles/file/pironopopajasukuwagu.pdfIn PDF document text
- http://abbuffalowings.com/uploads/files/5358070554.pdfIn PDF document text
- http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16359885455.pdfIn PDF document text
- https://bunian-co.com/other_files/File/25200619113.pdfIn PDF document text
- http://chieucoingason.vn/files/93494281014.pdfIn PDF document text
- http://mrhobbscoffee.com/images/uploads/file/9267800469.pdfIn PDF document text
- https://alistairmills.com/ckfinder/userfiles/files/gowejajojigavibulefuvota.pdfIn PDF document text
- https://powermailer.in/userfiles/file/38296718307.pdfIn PDF document text
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359717e5ab5---5510451179.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_off0000d5d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5D1	17292 bytes
SHA-256: `f8b50eaa4908c5fc3e5b4f7afe302dad535a9bce9e5044bdcd2f5a6213d55e63`
`font_01_sfnt_off00010313.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10313	10852 bytes
SHA-256: `fc34236d28db57614e6a2e6bfd9a663ad11390b3d2a0cfc71139ae8c32110161`
`font_02_sfnt_off00011c26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C26	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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