PDF malware analysis — malicious · 46ef2dc7170d05d4

MALICIOUS

PDF

94.3 KB Created: 2021-08-22 07:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: b50533814dc23085bc9d9aecec83327f SHA-1: d43f9251813c8427167bdba29d5683d491cc731b SHA-256: 46ef2dc7170d05d4d0081462c46c4e4c4077c1c59115b5fe895271278b8e4bbb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to exploit user trust.

Machine Learning

Nyx PDF Classifier malicious score 0.9726

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://innotec-industrie.be/userfiles/file/35196184018.pdf In PDF document text
- https://prtl.pl/userfiles/file/10612330796.pdfIn PDF document text
- http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/87549392202.pdfIn PDF document text
- https://kisikana.hr/userfiles/file/zuwileruragukuk.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116d4d575599---84371151796.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aba56747e66---41511670742.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757df0534e1---62063861288.pdfIn PDF document text
- http://galgalesh.com/userfiles/file/63568315442.pdfIn PDF document text
- http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d8446e448---zuwaxijajorurusimopivuje.pdfIn PDF document text
- https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/bc240293aebedd68cf313cd2a1c0568b/34096032124.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be008094763---dazolijedadovevufewu.pdfIn PDF document text
- http://chithanhplastics.com/uploads/userfiles/file/43915705816.pdfIn PDF document text
- https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/p6foid2eaiep95iuqh6g2qa9ln/28539075324.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b453133f57---92924065563.pdfIn PDF document text
- https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/fovubox.pdfIn PDF document text
- http://yeditepegumruk.com/userfiles/42566949874.pdfIn PDF document text
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee296a0676e---torudafotezawufevezamega.pdfIn PDF document text
- http://karunb.com/UpLoads/files/gelefel.pdfIn PDF document text
- https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/cc18c96dbae45d9af0d275dae7e03709/26606249581.pdfIn PDF document text
- https://semagro-msw.ru/pics/images/file/xaniwuxozunur.pdfIn PDF document text
- https://fanaf.comarticle_ressources/file/53233858156.pdfIn PDF document text
- http://dambi.pl/userfiles/file/napesopeweri.pdfIn PDF document text
- https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ht570kgih4ng73hvkurdr8mhlh/butisenudijasabokudekawuv.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3db5c8acc569861fb2bc450329adb67d/wixemexijimimewalugibixaf.pdfIn PDF document text
- https://abouelhoulgroup.com/userfiles/files/wofofi.pdfIn PDF document text
- https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5123084b---somulu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=lord+of+the+flies+while+reading+chapter+3+worksheet+answersPDF 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_off0000f3bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3BF	16104 bytes
SHA-256: `bab1dde8c64e4628f51c4c7f0c65496a3478f71f26e10a4b351283e840e76f95`
`font_01_sfnt_off00011d44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D44	17756 bytes
SHA-256: `c219c5e86e4fd8e45a92db56ed9528065ae7aef448cc038cb9465566218da35c`
`font_02_sfnt_off00013832.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13832	11204 bytes
SHA-256: `5f146ef0200290e5724ac1bd49e9225ead84595350ab48dc1b4468635c2ca838`
`font_03_sfnt_off00015245.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15245	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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