PDF malware analysis — malicious · e6a361d779ded13d

MALICIOUS

PDF

75.4 KB Created: 2021-08-15 20:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: e7fa3b8522dfa99a50c9647ad4c2f864 SHA-1: 091dbafa4ebc5dc20e68778ef889aa84c669d105 SHA-256: e6a361d779ded13d78825ff41ea849415257f11ee13d90869b14dfd881ef0169

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the nature of the heuristics point towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://garglob.ru/uplcv?utm_term=wpf+listview+datatemplate+trigger PDF link annotation
- http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609edbaea4825---62968321778.pdfIn PDF document text
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/d0fac8f9aca9d8a0869d098f052085ca/64558951455.pdfIn PDF document text
- https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/7a65fdc63084fc225331f495cb523c89/19844210497.pdfIn PDF document text
- https://locktactyuma.com/userfiles/file/92787928443.pdfIn PDF document text
- http://agrocare.hu/ckfinder/userfiles/files/xofemorabodolo.pdfIn PDF document text
- http://abcbyspu.com/ckfinder/images_store/files/wovadikisorutegumosi.pdfIn PDF document text
- http://desagresbrts.com/clients/34568/File/texutivajesopakes.pdfIn PDF document text
- http://sewakendragroup.com/userfiles/file/56309771614.pdfIn PDF document text
- http://luingpyrex.cz/foto/Image/file/doguvuxokibemuxaf.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbbd94de5f---milufevomawupuvizisupavuf.pdfIn PDF document text
- https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/bd510d08da75fe50f23b7f9e1a39467c/37097125151.pdfIn PDF document text
- https://tectrongim.com/uploads/files/xasujolajasadutexoduwi.pdfIn PDF document text
- https://lifesmart.ro/ckfinder/userfiles/files/10154947069.pdfIn PDF document text
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b62930b981e---tewenuvav.pdfIn PDF document text
- http://t-eamplus.de/web/editor/files/15072801833.pdfIn PDF document text
- https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/20e7224ef34cf48367061a737b157bba/vexaluzitetuxolunapur.pdfIn PDF document text
- https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/d7061d74b4be8a1ec4c634da9be33a57/90755137810.pdfIn PDF document text
- https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/nige0uog3hmri97fc9257fapjl/mikosamogazupelinixoguzu.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16098b482dbdfa---regituno.pdfIn PDF document text
- https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/af206c7a497a8af42fcd42a7c130bed3/59099298365.pdfIn PDF document text
- http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/83671634e84faae0cec09e4d416f0a01/22397586191.pdfIn PDF document text
- http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdf5084fc7---rivururawaf.pdfIn PDF document text
- https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/369e90a236647395b5d82af7691a33a2/79897289357.pdfIn PDF document text
- http://fitviewer.de/files/file/kefijuvekokikapovajokegob.pdfIn PDF document text
- https://www.antoniopopolizio.it/ckfinder/userfiles/files/60072057223.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_off0000c37e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC37E	16368 bytes
SHA-256: `e155aea116c1d949945a3b6bba8c6a4335446a3b917a3a6b8d07847977a83980`
`font_01_sfnt_off0000ee0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE0D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010624.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10624	10760 bytes
SHA-256: `e3c4c3bf237cfabb4d2fc6cf33fabc361ef23f9de9c7c5fe09c285635c52e53b`

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