PDF malware analysis — malicious · a6bdbb922dd1cf6f

MALICIOUS

PDF

86.6 KB Created: 2021-07-19 05:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: c2e1c5bb49c6018b487c07b5de829f90 SHA-1: 68077a7c722ec8984d301a2039681c755a57141a SHA-256: a6bdbb922dd1cf6f94a9ce1628c36ed054860968ef8a644473029a405807d62f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The file's structure and embedded links indicate a phishing or malware distribution lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ea97bdab680e05c5ad9243a1ba368465/75622639716.pdf In PDF document text
- https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/06e24ef1dcdb9413ce64b384239a0b09/17780372480.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c034c4b4685---gigugagom.pdfIn PDF document text
- http://valleypainclinic.org/userfiles/file/47667006087.pdfIn PDF document text
- https://tonymusic.se/UserFiles/files/99420939382.pdfIn PDF document text
- https://arabacioyunlar.com/calisma2/files/uploads/sazulesovu.pdfIn PDF document text
- http://caphegiabao.com/upload/fck/file/merixuj.pdfIn PDF document text
- http://northjerseyseniormenssoftballleague.com/clients/2/22/22e10641a135963e7b476298ec508c3c/File/fulagubazoramusaxozud.pdfIn PDF document text
- http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f36ccdb3a8---rejovupujovedizifubaji.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160821aa5cbbb7---temujemo.pdfIn PDF document text
- http://ranaghatpchsschool.org/userfiles/file/30817140025.pdfIn PDF document text
- https://chambredhotes-savoie.com/ckfinder/userfiles/files/dozekuxoxifisizoxibuxowij.pdfIn PDF document text
- https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/d43456521248929d2bac2a321f9725e4/risepewe.pdfIn PDF document text
- http://gialtour.it/themes/userfiles//files/24483616092.pdfIn PDF document text
- http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1362e2055---90689050576.pdfIn PDF document text
- http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/70408954341.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/0e2c12543dcdf1a590c75611223cc713/12428067509.pdfIn PDF document text
- https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/9fc6303857cf75b8ad3ab44bfea31d8c/guveboleso.pdfIn PDF document text
- http://testplanet.nl/uploads/files/339568344.pdfIn PDF document text
- https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b22b95bd547---63275938330.pdfIn PDF document text
- http://jjinline.org/file_upload/file/gogevitanebopimobigotod.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e292c59378e9f7a9d0607ebc05db23c5/241951429.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16082816d00317---30036249770.pdfIn PDF document text
- https://nonbodepsg.com/uploads/files/45968893753.pdfIn PDF document text
- http://asianmosaicnyc.com/userfiles/file/58358518170.pdfIn PDF document text
- https://deitratech.com/userfiles/file/linemeragugazoj.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+convert+pdf+to+word+in+acrobat+xPDF 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_off0000eee4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEE4	10784 bytes
SHA-256: `6f1d72fe947bc415dd4083504ddf5c75a3db465ef7b90356af74fad63f1609a8`
`font_01_sfnt_off000107a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107A9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011fbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FBB	17240 bytes
SHA-256: `94faad5bf959dfbebf5871f8035292c9deeb72ee0ec4db98145068ffb95a563c`

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