PDF malware analysis — malicious · 3cfc88e880997e9c

MALICIOUS

PDF

75.4 KB Created: 2021-09-04 22:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: c723c6b14949a60b9ddc2d7ebdfa5df4 SHA-1: 57c897ce8327b672b489ca89ce1322e5daf27831 SHA-256: 3cfc88e880997e9c8e8b9695facd677e6b03b4ff592d0edab50bb4c7b3999338

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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://infrive.ru/uplcv?utm_term=functions+of+derivative+market+pdf PDF link annotation
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e87b3ea4b63---57753113083.pdfIn PDF document text
- http://lctrading-gmbh.com/ckfinder/userfiles/files/xekebinatituzipelul.pdfIn PDF document text
- https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0618d5beb9---73338780263.pdfIn PDF document text
- https://bobecoingatlan.com/uploads/editor/file/14953899274.pdfIn PDF document text
- https://dunaweb.co/bg_image/files/zipoviwugazetejudipipul.pdfIn PDF document text
- https://gagiongvitgiong.com/ckfinder/userfiles/files/30207633006.pdfIn PDF document text
- http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/pogefopezupalosiburanoz.pdfIn PDF document text
- https://eventpro-kontraktorpameran.com/uploaded/files/57674277054.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/0uvh6plv0tk5hojot50vbs4jf1/8696955584.pdfIn PDF document text
- https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/e9a75d540de297b1c60a3a9a60688dbe/34566115675.pdfIn PDF document text
- https://consultingexpert.eu/fckeditor/userfiles/file/megexuxubuwu.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/1fc9e9b9bc4e72492e555fcd1cc4d17a/82698056194.pdfIn PDF document text
- https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b80be2342---vokoluta.pdfIn PDF document text
- https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c603ce2b001---pazusalipoluzesijubesimeb.pdfIn PDF document text
- http://guyfamilyreunion.com/clients/41950/File/domakogeraditojik.pdfIn PDF document text
- https://tailormade-sales-marketing.com/userfiles/file/54962289897.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/5dbed555d42cbf9b048c8d7b60a7ee14/5939986863.pdfIn PDF document text
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611ec3f1d33d3---80655788282.pdfIn PDF document text
- https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/d0f39132e047afb650196546fe67d843/visodifusoxar.pdfIn PDF document text
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da17401362---11356710932.pdfIn PDF document text
- https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/010afa5416805049617d6f8f8da8c326/pazasopunebujusuzulem.pdfIn PDF document text
- http://chenruichem.com/upload/files/38694314641.pdfIn PDF document text
- https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/3570a1e6ce508dae4a81063e3ca9ddd8/5402299067.pdfIn PDF document text
- http://aliceinformaticasrl.com/user/pages/57930327631.pdfIn PDF document text
- https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/9de53025f03afb3a979aca7bf9d15076/56338147812.pdfIn PDF document text
- https://a2designbg.com/userfiles/file/padulotimidavuvukabug.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_off0000c2d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC2D3	10968 bytes
SHA-256: `2994803c07707164e9bbb1057fc2d8ad323289c693d7f039a500ef3928e6a2c2`
`font_01_sfnt_off0000dc57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC57	16900 bytes
SHA-256: `d951980b6a85058c087fd45101bfd8e4dea164ce0ef1121eb6e8d039b49abe1e`
`font_02_sfnt_off000107f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107F4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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