PDF malware analysis — malicious · bc94dd257a11957b

MALICIOUS

PDF

85.3 KB Created: 2021-06-25 14:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: e7252f04a24f13ae83f25ecd28f0064f SHA-1: b22f962e069611187ded0a1e2c8663804e9ab601 SHA-256: bc94dd257a11957b184b4569d87dd1fb7f9efebd8a79265dfaa817163c9902cb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the conclusion that the document is designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://ketchas.ru/uplcv?utm_term=the+definitive+book+of+body+language+download PDF link annotation
- http://bitite.lv/media/txt/122/file/zifalukedojapanetafagexe.pdfIn PDF document text
- http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a3581737a---dedabisevugagozokezape.pdfIn PDF document text
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160af79ade3492---65286338299.pdfIn PDF document text
- https://careeraccelerators.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160793d14ca96f---juvogoxogane.pdfIn PDF document text
- http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609086fbb4571---xurazevekamovo.pdfIn PDF document text
- https://bahamianbrewery.com/ckfinder/userfiles/files/1731705934.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15a101d9ec---wixavopi.pdfIn PDF document text
- http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa44f4b06d---gonufosuzi.pdfIn PDF document text
- https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9dc3ccb13---27874808032.pdfIn PDF document text
- https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceec886e60b---42386220010.pdfIn PDF document text
- https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/gmrgc01lsq2ll4v5nost4ehdmt/20262139122.pdfIn PDF document text
- http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/c70b1a7a4a254817fcd8860260e900a0/44447037725.pdfIn PDF document text
- https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/fe16576935393c2e54b428761e70d568/19564530231.pdfIn PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072959a62a2e---56220135995.pdfIn PDF document text
- http://mevlanaasm.com/resimler/files/tagujudazamu.pdfIn PDF document text
- http://bjhtdszdh.com/v15/Upload/file/20215251417428018.pdfIn PDF document text
- https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/03913bb9797fd97be5eb41ba7996d74f/88416914984.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160706f5554699---23769012463.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_off0000ea7f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA7F	10928 bytes
SHA-256: `a78cdef5d2d068998e71abda61c54be8d337eb7c7aee1a36c0c22dd721bfdedd`
`font_01_sfnt_off00010398.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10398	17064 bytes
SHA-256: `87a81f018a4c2dafd7178663f5e1021a7c12a487d45e7e0796de3fe67cff1af9`
`font_02_sfnt_off0001300c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1300C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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