PDF malware analysis — malicious · c72049703abefe5b

MALICIOUS

PDF

103.6 KB Created: 2021-06-30 11:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: b0fc88befe8aecc1bd02c159782ecc68 SHA-1: 2ceb896de2dba4964ef1f9cb0064c2b9e7e1bd89 SHA-256: c72049703abefe5bc8ff1d22533c78545d2804f38b7ac678f145c4c4c9b11b68

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and is identified as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9682

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://smidgel.ru/uplcv?utm_term=got7+bambam+pictures PDF link annotation
- http://batiment-tunisie.com/userfiles/file/56874640326.pdfIn PDF document text
- https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/6ac52baae5ea84c40a06c13d614cf1ee/rifikunovosolawabuvebezum.pdfIn PDF document text
- http://quick-thailand.com/images/uploads/file/xoxulegodowubore.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0bd63c016---63796321463.pdfIn PDF document text
- https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/sg2kfa30rfdrs0fdfe5td5lqm6/7491850207.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/nermjv52ielk2t76kosi28joe4/kipojavarabe.pdfIn PDF document text
- https://semut73.com/contents//files/40284604303.pdfIn PDF document text
- http://suachuabaoduongmaynenkhi.com/img_quanganh/files/fukemev.pdfIn PDF document text
- https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/76646742950.pdfIn PDF document text
- https://argentinaproduct.com/ckfinder/userfiles/files/80239266418.pdfIn PDF document text
- https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c48b758a87---19570042452.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/93bac7655fee05ef35f2b21747b48601/20604935824.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b469f713556---joluzupenodenowuturuji.pdfIn PDF document text
- https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/irirb34gr14csdb4464hbgtss0/vuwirizasuwomap.pdfIn PDF document text
- http://legalinet.eu/userfiles/files/jugijuvejebubotur.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/b47c344bcd45a19564c5710a140624d1/jilugoxubunam.pdfIn PDF document text
- https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/fc6ea4b0c01fd1f2cd5b93810e0b51a5/savebigavu.pdfIn PDF document text
- http://china-zub.ru/userfiles/file/26282642794.pdfIn PDF document text
- https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/a1a4a9bb502a4ab7368fdd239543e805/7969598587.pdfIn PDF document text
- http://www.awakohchang.com/image/upload/File/0148402054.pdfIn PDF document text
- http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160763da12f4be---87542346102.pdfIn PDF document text
- http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6fbb9aea9---gevimunabomulex.pdfIn PDF document text
- http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a3d468ad6---ribugaw.pdfIn PDF document text
- https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/db8804389af324b6617d073ee86ef486/wuvisuxamejesir.pdfIn PDF document text
- https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160825ee43af53---86709240429.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bd8e9dc82---xakowobojabupoferuka.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010e0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E0D	18784 bytes
SHA-256: `abfdabaa0149f4a5c77d2753d52cef50e70a20331fe645146d04bc01dd1906e2`
`font_01_sfnt_off00013f28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F28	10716 bytes
SHA-256: `01f74424918c9ec0622520242e6e880e55dd4bc66a7d17eb0f3e6873e4cf97ed`
`font_02_sfnt_off000157b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x157B9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00016fc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16FC7	10460 bytes
SHA-256: `4b8e2ba61406e9b159a53df3f78c9373ac75707ef4d9937905e1b540de9e3118`

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