PDF malware analysis — malicious · 5e63d8de24c43986

MALICIOUS

PDF

92.4 KB Created: 2021-07-02 17:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 4074eaa25f89b6ce066e5369c04d5b3f SHA-1: a39f0b87e61f8870e6c6b3b30cb7624eb731737e SHA-256: 5e63d8de24c43986e231278c25eb121e567c3ba9ce7c2230b34e299857c7d40d

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to compromised WordPress upload storage and other domains, suggesting it is part of a phishing or malware distribution campaign. The document also includes lures to enable editing and a visual download button, indicating an attempt to trick the user into downloading a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

Heuristics 8

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.
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/et2qosointtuonr1plfmhb3v54/78209487577.pdf In PDF document text
- http://broadgatecapital.com/userfiles/file/49995598500.pdfIn PDF document text
- http://ankamet.com/userfiles/file/24383261647.pdfIn PDF document text
- http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094e3a4b3e70---54063727628.pdfIn PDF document text
- http://apsencollege.org/test/fckeditor/file/2114098315.pdfIn PDF document text
- https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/342459f006a72422218263f843e64476/1062445654.pdfIn PDF document text
- http://divorce-difficile.fr/userfiles/file/sorarozeruw.pdfIn PDF document text
- http://dichvu12h.net/userfiles/file/24285135755.pdfIn PDF document text
- http://espacioschillout.es/images/admin/file/5556229810.pdfIn PDF document text
- http://studioambienteterritorio.it/userfiles/files/8040881394.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7cc4a1a01---8664702934.pdfIn PDF document text
- http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b36af5291f6---75501093716.pdfIn PDF document text
- https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3901fc7422a3e7a113a2e8f67e7a4c2/mosixudagubelapelinada.pdfIn PDF document text
- http://almar-bus.pl/userfiles/file/21216917725.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/af5cf5e9fadba89b56094f8d7a5b1a20/78188058881.pdfIn PDF document text
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608470f024818---giwekanowogumitadigizumi.pdfIn PDF document text
- http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9dd557a5c---53205023150.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d83b7e4a876---siket.pdfIn PDF document text
- https://accuratesearch.com/userfiles/file/niboderitir.pdfIn PDF document text
- http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/c6a358b716062f8ee121aecf6836c1a7/47369206958.pdfIn PDF document text
- http://backupcenters.com/userfiles/file/fokumolabijadefibeko.pdfIn PDF document text
- https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/fe7ad314dc54f7baefcd1adb09f71c60/46830963955.pdfIn PDF document text
- http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/44960269219.pdfIn PDF document text
- https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/67ebbdd0df152c84f36e2e1d36f58053/5728777014.pdfIn PDF document text
- http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726786d5d69---repinib.pdfIn PDF document text
- http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/0pidmkm0g8jff9so675lv65rg2/45858085162.pdfIn PDF document text
- https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/453bf8f235907d0dba228c2bcfb8c495/lufunufi.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=convert+multiple+png+to+pdfPDF link annotation
- 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_off00010646.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10646	17340 bytes
SHA-256: `75efebaf323a41eef3527b197df3119f0c6afbd530cdbdb59370c012f75227f2`
`font_01_sfnt_off000133c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133C2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014bd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14BD9	10708 bytes
SHA-256: `2593f995dcaf16813f53be1e155afef11cf5516a23a8ac6f2a9fe43907b6f2fc`

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