PDF malware analysis — malicious · 0d33031357e76315

MALICIOUS

PDF

85.4 KB Created: 2021-09-04 06:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 36dc770bdd132a69275346af564926d7 SHA-1: 158d95679c36057870e68f210c550ddee66c97b6 SHA-256: 0d33031357e763150987a1368fe897761e1c91bef506294371f4a7dca66629f6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document's structure and link farm characteristics indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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://sieuthibongda.net/ckfinder/userfiles/files/ronoxitavu.pdf In PDF document text
- http://westernstudioservice.com/admin/userfiles/file/21245810424.pdfIn PDF document text
- http://ctyrkolky-gamax.cz/data/dokumenty/66344644347.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d94598204---sepururutepumaz.pdfIn PDF document text
- http://akicgiyim.com/userfiles/file/9101772387.pdfIn PDF document text
- https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3b98bc7574ce853ae2de53ed6a110b6/texive.pdfIn PDF document text
- http://stnicholasway.com/userfiles/file/70611908145.pdfIn PDF document text
- http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bonokupukituriguworesuwok.pdfIn PDF document text
- https://traveletrust.com/basefile/traveletrustcom/files/leroj.pdfIn PDF document text
- https://pinpointfeedtech.com/ckfinder/userfiles/files/96463706949.pdfIn PDF document text
- http://messtores.ca/fck_user_files/file/diripujezonofilapewulab.pdfIn PDF document text
- http://aodaiminhhanh.com/app/webroot/uploads/files/zuxexulemalategozamujoki.pdfIn PDF document text
- https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/3563f4525390412def4dfb177fd95863/kufovavipikojiti.pdfIn PDF document text
- http://abovomedia.hu/_user/file/76735733466.pdfIn PDF document text
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad096604a7---puluk.pdfIn PDF document text
- https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/3eed42bca731fc190835c084f4300e62/28029430962.pdfIn PDF document text
- http://pr-jam.com/ckfinder/userfiles/files/tuvijuteto.pdfIn PDF document text
- http://anupbolivia.com/images/files/29009169341.pdfIn PDF document text
- https://alansglobalservices.com/ckfinder/userfiles/files/fixug.pdfIn PDF document text
- https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/dcd4aa51c0b2248be3799098f814ce32/lujovujireri.pdfIn PDF document text
- http://lawngo.net/fckfiles/75060211484.pdfIn PDF document text
- http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/46760437191.pdfIn PDF document text
- http://tokyoto.pl/UserFiles/file/linag.pdfIn PDF document text
- http://agapetown.net/ckfinder/userfiles/files/75126680791.pdfIn PDF document text
- https://metnar.pl/web/uploads/files/6858156007.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/c1j3mulvnujc2nik81ip2q4p41/gaxokezemilutafitup.pdfIn PDF document text
- https://ceccargiurgiu.ro/userfiles/file/kosupemeluwuxepurexi.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=manual+flash+camera+settingsPDF 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_off0000e7eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7EB	10756 bytes
SHA-256: `62746e4066ef3f9ff86cb0ca05014954e27cc0fe4209819079327038af78ebaf`
`font_01_sfnt_off0001006f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1006F	18360 bytes
SHA-256: `9822aef83c683f0c9c6bc9184ca712e292ff18d307e7065cbcdd3e6e86fd9db6`
`font_02_sfnt_off00012fe2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12FE2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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