PDF malware analysis — malicious · ee7fd0505401ff2a

MALICIOUS

PDF

90.3 KB Created: 2021-09-16 22:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 61f4f7bc980db30b5bc401f20c48ed54 SHA-1: 0d524182df56bc09b870cae7f1d2b42d618057b3 SHA-256: ee7fd0505401ff2afb66718bd5edbd56812d20c847fe862f4643779bcd65f2f2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories or are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary function appears to be directing users to external, potentially malicious, websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9923

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://grubstreet.ca/ckfinder/userfiles/files/wakenuxurilo.pdf In PDF document text
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613793d14facf---visinaj.pdfIn PDF document text
- https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/11524489369.pdfIn PDF document text
- http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16141121229cd2---gawenuruforot.pdfIn PDF document text
- https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/woxisajudirozeg.pdfIn PDF document text
- https://bahceneryaman.net/public/content-images/files/15218612025.pdfIn PDF document text
- http://nanopena.cz/upload/file/66048507906.pdfIn PDF document text
- http://kocavietnam.com/upload/files/64245244578.pdfIn PDF document text
- http://capital96.com/userfiles/file/majufevogagejirilanig.pdfIn PDF document text
- http://indianspringhomes.net/userfiles/files/27074275671.pdfIn PDF document text
- http://peneleos.pl/userfiles/file/zemupemoboromuregil.pdfIn PDF document text
- https://altinhediyeler.com/calisma2/files/uploads/6790182120.pdfIn PDF document text
- http://jandenzobv.com/image_uploads/file/dolape.pdfIn PDF document text
- http://www.groupementpecheduloir.com/ckfinder/userfiles/files/nikamowesamefop.pdfIn PDF document text
- https://dennismaloney.ca/upload/editor/file/gavalitelaxovabirigirir.pdfIn PDF document text
- http://czyxchem.com/upload/files/68989973076.pdfIn PDF document text
- http://ogledalata.bg/uploads/pages/files/34668809224.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/158ca0c9bc38cf93fcfda07b7290f4dc/mugoxalujojerefipegirowug.pdfIn PDF document text
- https://vmwarts.com/ecovic/file/zobogomapizesadexiferu.pdfIn PDF document text
- http://sandlnae.com/data/editor/file/64507673126.pdfIn PDF document text
- http://kenshopvn.com/uploads/files/dubosoluxeru.pdfIn PDF document text
- http://inbeeldt.nl/userfiles/file/31543321511.pdfIn PDF document text
- http://hsi-international.com/ckfinder/userfiles/files/zevok.pdfIn PDF document text
- http://whuntex.ru/userfiles/file/nukivosaberesodedisa.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c56535694e---wukazupudogivuw.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=free+pdf+to+excel+converter+softwarePDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dbf1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBF1	10752 bytes
SHA-256: `ef8d1eaa77b037fcd11d15c144f7c5f5f22c6dc9faa822f86804a63cc5e24901`
`font_01_sfnt_off0000f4e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4E0	21180 bytes
SHA-256: `c134ffb0f882057ad6e52041cd45a7f658a7d613576c91848a2b6197595a5ff8`
`font_02_sfnt_off00012d0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D0C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0001451d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1451D	16148 bytes
SHA-256: `b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59`

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