PDF malware analysis — malicious · 72f35201ce5e9ad6

MALICIOUS

PDF

78.7 KB Created: 2021-09-01 08:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 6f5acfaeb6cb59711be7e7d3feeafbd9 SHA-1: 0e08d97066806a0a0335946da76789f7645aee8b SHA-256: 72f35201ce5e9ad62e85a60d35c4621b16acbc386553c17f9405f9dbd0e33152

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm used for phishing or malware delivery. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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://nomylo.ru/uplcv?utm_term=the+bird+in+the+hand PDF link annotation
- https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/775ea9d6781de64534af3989d5a534ac/62572505453.pdfIn PDF document text
- http://galantemontagnana.it/ckfinder/userfiles/files/voduwuteriwexanonazu.pdfIn PDF document text
- https://premiersuli.hu/files/files/16605861378.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089969f5d199---59349594586.pdfIn PDF document text
- http://gabinetortodontyczny.eu/userfiles/file/tupefexarawi.pdfIn PDF document text
- http://currycornersugarland.com/admin/images/file/6763658566.pdfIn PDF document text
- https://equalland.com/uploads/File/4941963567.pdfIn PDF document text
- https://pindimana.in/uploads/file/ribaximijirep.pdfIn PDF document text
- http://realfootball.gr/userfiles/file/13281080679.pdfIn PDF document text
- https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/495vpino58n9ac6uno8pge6vc3/88302549292.pdfIn PDF document text
- https://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/vofupusulifererinoket.pdfIn PDF document text
- http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969d53e835f---vikobil.pdfIn PDF document text
- https://detmers-kontejner.hr/files/15622281282.pdfIn PDF document text
- http://kapalishakti.com/ckfinder/userfiles/files/mugonewuwidi.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/73ff5132d3fc551f594fa963a1dfc39a/14642141284.pdfIn PDF document text
- http://qhchemicalsfeed.com/upload/files/xukuvumifulodudafarosomuv.pdfIn PDF document text
- http://praconsulgroup.ru/pict/file/difixawafojetonalurejex.pdfIn PDF document text
- http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5cc4a0503---2036707127.pdfIn PDF document text
- https://pasarangroup1.com/contents//files/mimadoruda.pdfIn PDF document text
- http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4b733923f---57637618154.pdfIn PDF document text
- http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fc88eec10---kinunojasuvapufozum.pdfIn PDF document text
- https://www.myosiaffiliate.com/199trust/img/file/52400475469.pdfIn PDF document text
- http://derma-dts.de/files/file/jikinagore.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_off0000d342.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD342	10116 bytes
SHA-256: `a1c5168d8568f3e3835162e047e49b333808d64e09a56e9877c35a7cb3d1250e`
`font_01_sfnt_off0000e9ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9BA	16604 bytes
SHA-256: `a91f7fbf29450333354f786c873fb4afc2b22b3a8e4f528bdaa5bebf7ef3da7d`
`font_02_sfnt_off00011414.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11414	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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