PDF malware analysis — malicious · 3e24a74942f1cdb5

MALICIOUS

PDF

86.2 KB Created: 2021-09-12 16:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: ae483c19fdc0cfeeda87cb98467d878b SHA-1: b6df0ee8a302af26437380928dd54d99471c31e6 SHA-256: 3e24a74942f1cdb5a50ec2d4dd29722905e89d4f77b553f655997060925300bc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final destination. While no scripts were explicitly extracted, the nature of the embedded URLs and the detection names indicate a phishing or redirection scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://twinscooking.nl/twins/userfiles/file/7693305570.pdf In PDF document text
- http://koutingchina.com/upload/files/lakalirusefule.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612efa06619e0---dujutonugo.pdfIn PDF document text
- http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/bajanexobimowewuki.pdfIn PDF document text
- https://aucordechasse.fr/vosImages/64142472071.pdfIn PDF document text
- https://basisangka.com/contents/files/21020481581.pdfIn PDF document text
- https://morethancars.eu/uploads/edytor/file/26338444776.pdfIn PDF document text
- http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613792dbd6769---65643700164.pdfIn PDF document text
- http://xn--49s538bo8ux8c.net/userfiles/file/bewugofolabemegu.pdfIn PDF document text
- https://bloc-immo.com/images/26871237849.pdfIn PDF document text
- http://lnv-cnc.com/userfiles/file/notuzag.pdfIn PDF document text
- https://inmaabiladi.com/userfiles/files/6758694025.pdfIn PDF document text
- http://thepokeluau.com/uploads/files/palinosidepikurumanogomow.pdfIn PDF document text
- https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/g0kfq5pafgkjilfvejiol5vkfv/veridedodaxutusi.pdfIn PDF document text
- http://rebornfair.com/FileData/ckfinder/files/20210905_B2B35B5945A5C20D.pdfIn PDF document text
- http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/sesitaso.pdfIn PDF document text
- http://nawooelcs.com/upload/userfiles/2021/09/files/210909165443.pdfIn PDF document text
- http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/kuniwixad.pdfIn PDF document text
- http://mrpokedb.com/uploads/files/84016933446.pdfIn PDF document text
- http://gostinica-domodedovo.ru/files/32848309427.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/99336478e32436c1d30ea9df158ea0c9/72063992141.pdfIn PDF document text
- https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ead585518d---povapamosilirunib.pdfIn PDF document text
- http://esteticka-stomatologie.cz/files/content/file/78099432789.pdfIn PDF document text
- http://goteneplast.se/files/images/file/40010799447.pdfIn PDF document text
- https://ever-progress.com/upload/files/sopuwubitaxupeso.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=game+funluck+apkPDF 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_off0000ee25.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE25	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001063c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1063C	10292 bytes
SHA-256: `c048da5a4f5d9de2d3bcbd96804ece78c3651b708cc1a6cfabd54c9f3e41e75d`
`font_02_sfnt_off00011d66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D66	17844 bytes
SHA-256: `0eea6b14de4bda37af5c94bb4256235e363cebfd600af5163df4461f891c780f`

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