PDF malware analysis — malicious · cafe6b1cb5bf8abd

MALICIOUS

PDF

70.4 KB Created: 2021-09-25 20:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20

MD5: 1f102fabab35fa66bb8496d63910ad9a SHA-1: b60e10f2cf338872f3632b4df487c5755b0043d2 SHA-256: cafe6b1cb5bf8abd66de103f18ef25b1a170259bee01a470a76c28af5c29deff

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a phishing or trojan payload. The document contains a link farm pointing to multiple compromised websites, including WordPress uploads, likely serving as a lure to download a game. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=tekken+6+original+game+download PDF link annotation
- http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6545334216.pdfIn PDF document text
- https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e8a0a7876f---ferejugedaxofimakevopaduw.pdfIn PDF document text
- http://gesundimjob.at/images/content/files/46929618975.pdfIn PDF document text
- https://casaalu.com/luutru/files/3868972889.pdfIn PDF document text
- http://paradisoseminatrici.it/userfiles/files/15993662582.pdfIn PDF document text
- http://newworldss.com/uploads/file/17571938599.pdfIn PDF document text
- https://mar3ol.com/Files/files/kibatebapupikusid.pdfIn PDF document text
- http://ndt-ultratech.com/files/javixiwiwotetubamilove.pdfIn PDF document text
- http://kopdesign.nl/userfiles/file/46348983028.pdfIn PDF document text
- https://guruvinodji.com/Userfiles/file/39844545382.pdfIn PDF document text
- https://bititechnika.com/uploads/file/zajazagarul.pdfIn PDF document text
- https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/fe1e42ae5ee139b7cca9c39114193369/faxisitupumexesepon.pdfIn PDF document text
- http://gadkowski.pl/repository/filemanager/file/34915804559.pdfIn PDF document text
- https://anitt.in/ckfinder/userfiles/files/97703384960.pdfIn PDF document text
- http://protezas.lt/i/File/logidafoxabiduda.pdfIn PDF document text
- http://baharev76.ru/userfiles/file/lolenivige.pdfIn PDF document text
- http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a368cef27d---56454546726.pdfIn PDF document text
- https://sanipacific.com/attachment/file/madus.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/0fc7a8ae6c6e57e18b4a22700a92a4f2/sefijoretixudaxa.pdfIn PDF document text
- http://gustosandvic.com/ckfinder/userfiles/files/75993387391.pdfIn PDF document text
- http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/88356455070.pdfIn PDF document text
- http://le-lemniscus-incandescent.fr/ckeditor/upload/files/65027712429.pdfIn PDF document text
- http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614cedd1037e5---gagavanodasesotofupidi.pdfIn PDF document text
- http://bookblog.kr/data/file/files/25591256993.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_off0000b2eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB2EB	10636 bytes
SHA-256: `f14d9f4974b4d08ecd6e92c47d06559374f6ff0b55299f80d1d706f921221670`
`font_01_sfnt_off0000cb18.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB18	15644 bytes
SHA-256: `efff691705ebf6bd5bd64e8179922e05b74d15ae68ab6afb632c1e94ce9857f1`
`font_02_sfnt_off0000f329.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF329	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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