PDF malware analysis — malicious · 7382296635f9ca04

MALICIOUS

PDF

75.4 KB Created: 2021-09-05 22:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: d3529d3c24661c152620ba40bf349ae2 SHA-1: 584a4e99cb7dabb628118e507614c59a02cffac8 SHA-256: 7382296635f9ca04d64b3237abd2b4a20f419729a05a2fc110ad4691d347e68c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting it functions as a link farm to redirect users to potentially harmful content. The PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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://brandnewgoods.net/userfiles/file/vipazolof.pdf In PDF document text
- http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abeae88b247---tilewiposugadijuvowoketaf.pdfIn PDF document text
- http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccaee780c7---89174113510.pdfIn PDF document text
- https://xn--z4qq44i.xn--kpry57d/upload/actfiles/36009465544.pdfIn PDF document text
- http://wojno-stal.pl/pliki/file/zinoz.pdfIn PDF document text
- http://ottotech.center/userfiles/file/29910613647.pdfIn PDF document text
- http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/ug30kdmik3nvj3h0nrdesj16ad/nawenonu.pdfIn PDF document text
- http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e221bff53---lupis.pdfIn PDF document text
- http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/hm6s3k81h5hg4kf2pl7udu9517/27890904950.pdfIn PDF document text
- https://its-bulgaria.bg/files/file/70306158261.pdfIn PDF document text
- https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/xelufododumap.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cc6fb13e441---73221772143.pdfIn PDF document text
- https://5udua.com/contents//files/mujanaxurag.pdfIn PDF document text
- http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/godapob.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7bee97c31---ditewapasaxox.pdfIn PDF document text
- http://kythuatviet.vn/uploads/userfiles/file/sewowoxivumamude.pdfIn PDF document text
- http://mientaytourist.com/uploads/files/soman.pdfIn PDF document text
- http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16104228a9851c---2275751754.pdfIn PDF document text
- http://www.europesolidaire.eu/userfiles/files/jonamamusikipukisitusomo.pdfIn PDF document text
- https://alzubidi.com/userfiles/files/94727383860.pdfIn PDF document text
- https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c6f81f2f8---41749788350.pdfIn PDF document text
- https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/180141e2f26724d16ec1564b1b25d914/87931368681.pdfIn PDF document text
- http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082bdce76ade---14693293236.pdfIn PDF document text
- http://ronaldtan.nl/images/photo/65160369553.pdfIn PDF document text
- https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/5786eef8eec5c55619a13e806b90b419/19988348001.pdfIn PDF document text
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/40d75de8c9c5105947928536ce4cabbf/povavefegewilupujinoj.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=facercise+carole+maggio+pdfPDF 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_off0000c384.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC384	10740 bytes
SHA-256: `40436f3cf1f289adc51271569111b999b250993f1967435cbc71bac532223323`
`font_01_sfnt_off0000dbed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBED	16884 bytes
SHA-256: `3456574acfbc48b152ceb810969b264282c30668dfb9d080538ac9e8e1e91a3f`
`font_02_sfnt_off00010812.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10812	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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