PDF malware analysis — malicious · 4e467aa2500d21b3

MALICIOUS

PDF

89.3 KB Created: 2021-06-25 20:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 21446b71ed0f62c4955502f63a9b02ad SHA-1: 1e2f643d5ddba610c41ffaf6943248f1780fe448 SHA-256: 4e467aa2500d21b311ea11cb93b6e37fe9d38cd4710feefa38f1a8c30a0491c2

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories. These links likely serve as lures for phishing attacks or to distribute further malware. No scripts were extracted, but the PDF structure and URL patterns are strongly indicative of a malicious campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

Heuristics 7

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.
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://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/d5705262a798f29d88fcfa068b08c940/25330704863.pdf In PDF document text
- http://7166867.ru/ckfinder/userfiles/files/85597747436.pdfIn PDF document text
- https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/6e716d44f4eb9429256e2ce6df010dd4/lenepadisa.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/esj0049dnq4hiccrnjcb4u5874/4888681097.pdfIn PDF document text
- http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c13acacdff9---mezominuneboruruko.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1b013beb4e9dee7354d5436498590644/52785554284.pdfIn PDF document text
- https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a353cc192450389887650882423ce7f/83950008880.pdfIn PDF document text
- https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/ugiad9rj862va6vfjb2equjmte/guxagomaruzuzil.pdfIn PDF document text
- http://ildungrice.com/fileupload/fckeditor/file/48422088718.pdfIn PDF document text
- https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf8f58c02e---pisivokuzataxive.pdfIn PDF document text
- https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/9b7e49990c3b58d77fd34c1ab50b8233/7755514251.pdfIn PDF document text
- http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/fe90353d5e0f12e46f21de52dff08e61/regugamuvafimabegikekig.pdfIn PDF document text
- https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd0aca4492---napavefujinuvozubenisezuw.pdfIn PDF document text
- https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/265615230cd276b4edf8d236d0d0d0d5/weniv.pdfIn PDF document text
- http://worldwidefilipinoalliance.com/uploadedFiles/files/vawik.pdfIn PDF document text
- http://aisef.org/uploads/userfiles/file/file/75069204283.pdfIn PDF document text
- http://ahkjt.com/upfile/file/14643505910.pdfIn PDF document text
- https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/8ccfeb67c2d50e2d66202a57b32bd03a/bafapakipu.pdfIn PDF document text
- http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3983e7845---kadavunitebot.pdfIn PDF document text
- https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/204d705d8f41fd4b9753ef1196738ccf/80401313851.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d53db404f20---wuguwezemi.pdfIn PDF document text
- http://baigeleather.com/userfiles/file/92820458603.pdfIn PDF document text
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081127e7dede---97473032991.pdfIn PDF document text
- http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e89c42817---30857122077.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3310aa40c---nijeruva.pdfIn PDF document text
- http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607e08e72e986---wivikagoxizazadipiboluw.pdfIn PDF document text
- https://abe-rdc.com/userfiles/file/89655662629.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+breakfast+club+full+movie+download+480pPDF 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_off0000f7cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7CD	16920 bytes
SHA-256: `09964c13dc40cf09037a4bfbeddceb7cbe3fb896903cac9c24ce8c77bea64d9e`
`font_01_sfnt_off000123d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123D4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013beb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13BEB	11740 bytes
SHA-256: `a6dd75f78964186733524e928c12b4272df7ab99f39b1414e5299490591f9a58`

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