PDF malware analysis — malicious · 2ef1502d5c465917

MALICIOUS

PDF

85.1 KB Created: 2021-06-29 21:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 87141abb01014f991f44d248a1ec8229 SHA-1: 1b93361143254255af90512af287fa28ba6256a2 SHA-256: 2ef1502d5c465917dba5bc67bb03ac8257fe2450a4310a3150d78ba3c86841bd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The file's structure and numerous links indicate an attempt to redirect users to potentially harmful external content.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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 https://wastran.ru/uplcv?utm_term=i+come+with+peace PDF link annotation
- https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9976550f88---29926167697.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/20407ab60817ea3bc9524151063b30f2/dejavod.pdfIn PDF document text
- http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f5478f0ba---pibifajituf.pdfIn PDF document text
- https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/0f70dd22777ec9830f662e3a1dea5a05/salozorid.pdfIn PDF document text
- http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa624692c73---kowopapininefirikirodub.pdfIn PDF document text
- https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/51afbe3d569e77329c528d2f3adfdf49/jesosun.pdfIn PDF document text
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/5r30hibmlshd0plungck820esc/55119802802.pdfIn PDF document text
- https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9294cb674f---bawuwogagu.pdfIn PDF document text
- http://sola-brothers.com/userfiles/file/75325576661.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a18526c6eb---lujekevewuvawi.pdfIn PDF document text
- https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160798d9f9404e---karuzatowop.pdfIn PDF document text
- https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ttfdm8def1prn52f0sbfd5phk0/17568907226.pdfIn PDF document text
- http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/dukive.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076031fb692e---46092239646.pdfIn PDF document text
- https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/3178c15c0439e841968722060dbd3e26/34510271394.pdfIn PDF document text
- https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/91f0318d16bdb0a5548747d429757fa3/dimuvobovebixaku.pdfIn PDF document text
- http://anhuizpyy.com/upload_fck/file/2021-5-21/20210521124500203008.pdfIn PDF document text
- https://akapacha.com/userfiles/file/48734939084.pdfIn PDF document text
- http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/k1lo7jh16bbstlt334b5f94s6o/nedotabavomexisosiwuku.pdfIn PDF document text
- http://school19-zav.ru/userfiles/file/83664855341.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1f7255cad---vonafurovesobujikurujug.pdfIn PDF document text
- https://newtech-utm.pl/userfiles/file/xuvedokivak.pdfIn PDF document text
- http://nappsa.org/userfiles/file/10663026309.pdfIn PDF document text
- http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/01hqmqqqjcp6iqaaifh3pvqoq4/sumebotozidulumalavizo.pdfIn PDF document text
- http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a0a1d16c0---14999964507.pdfIn PDF document text
- http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb7b8c6383---zulodezas.pdfIn PDF document text
- http://aiswaryamatrimonials.com/fck_uploads/file/dimazud.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_off0000e6e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6E1	18544 bytes
SHA-256: `697c2cf253220b1708d34922e460b5762a314ff7e486321406ead0555c576323`
`font_01_sfnt_off00011673.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11673	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012e8a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E8A	10256 bytes
SHA-256: `3e9b203f1e3581074fee925259787b9c6c9ab38ee53b18e4a14e004e34a0da28`

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