PDF malware analysis — malicious · 369ca295e64a491b

MALICIOUS

PDF

87.8 KB Created: 2021-07-06 14:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: d7f4d6f79130ca0d7bf4e6667939ce53 SHA-1: afaa2d2f69e6fcd802672a4e66987045ca0ce83b SHA-256: 369ca295e64a491b3f83cbbc978c1b8375b7f76aa4190172aa07c754d30fb2d7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to host or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the PDF structure and URL analysis point to a phishing or malware delivery attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

Heuristics 6

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.
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 http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/c4f8630e9b341f6a1de96ce1012cc735/18910572526.pdf In PDF document text
- https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b2b40a700---zibaraku.pdfIn PDF document text
- http://gymostrov.org/gymostrov/userfiles/file/wolol.pdfIn PDF document text
- http://wsm.hk/images/uploadfiles/file/4712577024.pdfIn PDF document text
- https://butchercurnow.com/img/shop//contents/sivelusegap.pdfIn PDF document text
- https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/69041f382eb7a626f5ae58b582667238/jimeniwurinusuguga.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb48fb10bde---38765386773.pdfIn PDF document text
- http://bkdesign.ee/userfiles/file/5316707489.pdfIn PDF document text
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b00564be4---64776160963.pdfIn PDF document text
- http://polymer-optix.de/userfiles/file/kiwokuwuxofolesilore.pdfIn PDF document text
- https://506hlapeta.com/files/file/togebavoto.pdfIn PDF document text
- https://kuepancong.com/contents//files/wuzutubifi.pdfIn PDF document text
- http://greenbrier101.com/userimages/gomokov.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6cdaf3228e---tedibifore.pdfIn PDF document text
- https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608297eacf85e---67349545060.pdfIn PDF document text
- http://sumtinathholidays.com/admin/uploadfiles/file/lojisosinupafejipo.pdfIn PDF document text
- http://prime42.ru/userfiles/files/wewunevir.pdfIn PDF document text
- https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/dc9554a37056a255914e0b256c1035cf/5868966760.pdfIn PDF document text
- https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/57ec3d4a100ef311f131d841bb63321c/8044042943.pdfIn PDF document text
- https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/e07a580b2d86beee1a26c5b4942dbaae/33953470224.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/t72s2vie5vig7alesgfkch34o5/16028142539.pdfIn PDF document text
- http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160922725633f6---zanof.pdfIn PDF document text
- http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b609ca95b---89057043366.pdfIn PDF document text
- https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/c1951eb569bef46d901b3c6898eff34c/mozebu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=maths+rs+aggarwal+class+9+solutions+chapter+1+number+systemPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000db38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB38	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f34a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF34A	17424 bytes
SHA-256: `26a4fd5e7413e27a95719bc29b81a4cc509224fb66c4828ccd86f9754c5bfa97`
`font_02_sfnt_off0001209d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1209D	11472 bytes
SHA-256: `e0d633a9d27d70c0e9a02fe317e3ca76b66233c2f62071f7f255483e310fb60d`
`font_03_sfnt_off00013b82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B82	16144 bytes
SHA-256: `5f2a87ed485690ae99dd00ffd3dad57dcaf6de75c4981ecbeeee12bb760f3f7c`

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