PDF malware analysis — malicious · 90d8511a05045b58

MALICIOUS

PDF

88.8 KB Created: 2021-07-07 14:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02

MD5: 614fb90267b3664a8dce3262e66ed365 SHA-1: 771b27b779544c6a62a6dc6478177e4a12825b54 SHA-256: 90d8511a05045b58f7044a1b25d8f069757be1521d0307ac400083c29c3cdcfb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://ketchas.ru/uplcv?utm_term=elastic+stress+concentration+factor PDF link annotation
- http://reicar.dk/userfiles/file/kevipubivuxowarep.pdfIn PDF document text
- https://too.kg/wp-content/plugins/super-forms/uploads/php/files/602cc3a973f1a2206e13c90f5219ee06/83606716193.pdfIn PDF document text
- https://aykutemlak.com/upload/ckfinder/files/xogepebuj.pdfIn PDF document text
- https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/930d2131860b5b76bd1f63a5258258e7/kobulaz.pdfIn PDF document text
- https://trexanh.net/upload/files/48863695755.pdfIn PDF document text
- http://dzbnf.com/upload/file///74274151359.pdfIn PDF document text
- https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/trenunstbkfcbk59h90t9212rf/sukabe.pdfIn PDF document text
- https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/9f0aa90760b76353d2b51bd3f4c740a8/bewimivebigoguzoxija.pdfIn PDF document text
- http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607878dc650c0---76345023223.pdfIn PDF document text
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/1cc9f44683388bbce2b190c54d275aef/9762645327.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcd6906ed0---xevugaranu.pdfIn PDF document text
- https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/9640325e3adee95e0f3af498e76ac600/gewutukumovuzixe.pdfIn PDF document text
- https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f3e00e3ef---zunojepovo.pdfIn PDF document text
- https://pasarantogelsatu.com/contents//files/remaluzo.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/8c1d2f588ce071ae494fb25e901d2a94/20038234462.pdfIn PDF document text
- http://kleiberit.ru/files/file/77842295787.pdfIn PDF document text
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bbeb7da20bd---suxolexamujurirejoli.pdfIn PDF document text
- https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160776c2717fcf---5624501907.pdfIn PDF document text
- https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896fdd1c3b8---xofavutezi.pdfIn PDF document text
- http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e2j5v5ta5dltihs0n5t41pr6r7/77576966867.pdfIn PDF document text
- https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7c4a839f8f225909949b10be4e898b8b/74631107156.pdfIn PDF document text
- http://brenno-tojestto.pl/userfiles/file/zaximazekoduzilipej.pdfIn PDF document text
- http://abimobiliare.pl/pliki/File/22118727307.pdfIn PDF document text
- http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/3le6ctt3f859911gojabgm2rg3/rinejitamofok.pdfIn PDF document text
- http://cdseoulps.com/uploadfile/fckeditor/file/48044177208.pdfIn PDF document text
- https://mariellatriolo.it/public/file/moturulubitibuxigilan.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_off0000f5b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5B8	18848 bytes
SHA-256: `9fb9f1b008959e972f4cb9d8a82688d18723029d2ce35ab156c9a138eded5e04`
`font_01_sfnt_off0001261a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1261A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013e31.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E31	10312 bytes
SHA-256: `e30920e4956df48eedd5a6283a2ba4019765f66d22256844da70038d3c852813`

Open this report in the interactive analyzer, or submit your own file for analysis.