PDF malware analysis — malicious · 72109638c2f694ff

MALICIOUS

PDF

101.4 KB Created: 2021-06-28 01:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 34b0fddf5c8c925af75a8a64bb48ddd5 SHA-1: 2f7ed7e3d876b8083515f18a422399776303856c SHA-256: 72109638c2f694ffb41dc6a84aca6d17d6a6d7cea767739e3aa4f85e53eb62b6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning model also indicated maliciousness. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs indicate an attempt to obscure the final destination and potentially leverage SEO tactics for distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9803

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 http://burrburroughsfamily.com/clients/55468/File/solamalufujafetogit.pdf In PDF document text
- http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099ef85be2eb---fomevobapabokinedadefig.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b0384b02155---91145918775.pdfIn PDF document text
- https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/e2047c6e9bd5fc80ed4c294da8934075/40485044259.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/v8gduqp1k1hi0ctoseq32e8691/losifi.pdfIn PDF document text
- https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b190f35ae0---pelon.pdfIn PDF document text
- https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/eef77ce0f2141dc367923387a5931820/1006790448.pdfIn PDF document text
- http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/gofopitavajatif.pdfIn PDF document text
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160901acb7d8f4---23605472218.pdfIn PDF document text
- https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/c5291d5d2edfb96b8dbd400d85e0292f/85310925768.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/t513co5m6se23v9s1c837b67b5/89143544056.pdfIn PDF document text
- http://guides2alpes.fr/uploads/file/dunaxixutezumilano.pdfIn PDF document text
- https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/omnh9s46fcfrh0bleio8rsc3q3/14342317028.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f615d4b5d---gubakoga.pdfIn PDF document text
- http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fd20b1dd2---gegidozak.pdfIn PDF document text
- https://dolaodong.com/userfiles/file/motaxunijam.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/83912870304.pdfIn PDF document text
- https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcebc67b66---kabijefepoladovoximefa.pdfIn PDF document text
- http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/65959528162.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a180e6f07b6---4925452441.pdfIn PDF document text
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d8656b6a96e---newagixoruf.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ace3bac848a---kebovajudepisesov.pdfIn PDF document text
- https://euroroma-bg.org/files/file/7442380516.pdfIn PDF document text
- http://gopherandsquirrelcontrol.com/admin/images/file/33045720943.pdfIn PDF document text
- http://lorichphoto.com/pictures/file/19437575766.pdfIn PDF document text
- http://workcoop.org/fckeditor/userimages/file/20210529194347.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=types+of+chow+chowsPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012d1f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D1F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00014531.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14531	16996 bytes
SHA-256: `796b8c4f60e65b2158823f46ab01adbe7a83555fc109758acc77cbd39432102a`
`font_02_sfnt_off00017133.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17133	10140 bytes
SHA-256: `829ef8c0de4278bb6491bb21045874731b86bee1f92ab633e27102328f143c1d`

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