PDF malware analysis — malicious · 124a1bfa38eebb6a

MALICIOUS

PDF

93.1 KB Created: 2021-08-15 00:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 4b64ba14a4a7f3a53ecb83878a2af646 SHA-1: 2af95481c623afad4e941119ba2791c81ea689f2 SHA-256: 124a1bfa38eebb6a42b06b324ac2df3f06f37b47b14cb678ebf8f9ab63459a85

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded JavaScript, though not directly executable in this context, indicates a potential for malicious scripting if the PDF were to be rendered in an environment that supports it.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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://oniceh.ru/uplcv?utm_term=google+drive+aladdin+2019+full+movie PDF link annotation
- https://am-system.eu/ckfinder/userfiles/files/12286537915.pdfIn PDF document text
- http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2a2c67b7f98f52c7d06f24ec2f50bdd7/7661666866.pdfIn PDF document text
- http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160736f5b6c3a1---4204731050.pdfIn PDF document text
- http://anapharmata.hu/ckfinder/core/connector/php/files/93365533647.pdfIn PDF document text
- https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6355b9e56---23826602132.pdfIn PDF document text
- https://botorka.ro/userfiles/file/wafopufavuwuzut.pdfIn PDF document text
- https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607eec44f07c7---kitikisibumoraba.pdfIn PDF document text
- http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084544a8cab9---6241978169.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/47308eb62e9a0c0726647e7bfc4207e6/kopoj.pdfIn PDF document text
- http://niestachow.pl/data/aktualnosci_imgs/file/1222027679.pdfIn PDF document text
- http://fitnessklub-impuls.pl/uploads/assets/file/97036821781.pdfIn PDF document text
- http://livingkaneohe.com/userimages/furakamonumogelumuvodafu.pdfIn PDF document text
- https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607031d7099f3---rudobigodire.pdfIn PDF document text
- http://shopsuathientu.com/uploads/userfiles/file/texanarimosirerufosorilak.pdfIn PDF document text
- http://pileshoppen.dk/userfiles/file/39216829160.pdfIn PDF document text
- http://nhandieurangmuoi.com/ckfinder/userfiles/files/22091165810.pdfIn PDF document text
- http://topimmigrationlawyer.org/ckfinder/userfiles/files/65848415165.pdfIn PDF document text
- http://artside.org/data/temp/file/7910983689.pdfIn PDF document text
- http://dichvuhieuchuan.com/upload/files/zonan.pdfIn PDF document text
- https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/ih2c7ctjglqbf2c48e2dvb7st7/49445450955.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cbe3c61b6---9033473651.pdfIn PDF document text
- http://debandhelder.nl/ckfinder/userfiles/files/85089619857.pdfIn PDF document text
- http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729d96d09d4---fonalog.pdfIn PDF document text
- http://consorzio-csa.it/userfiles/files/xegegojuv.pdfIn PDF document text
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160894f37cd653---fuvopave.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_off0000ee53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE53	17500 bytes
SHA-256: `389695ad147b9ba4bc2e29fa2ee67a0dda9a08e1368e0309c684760287524aac`
`font_01_sfnt_off00011c1b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C1B	11100 bytes
SHA-256: `a88d5cef2061c292e9982027be19c900a69823370fedc6008a72f3098902e9d2`
`font_02_sfnt_off000135dc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x135DC	16308 bytes
SHA-256: `056c635445ae957760832ad9ce81bbca3f4175d3b80c9769c6e0874bf6aba3e0`
`font_03_sfnt_off00014bd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14BD9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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