PDF malware analysis — malicious · a93309790c8ddc43

MALICIOUS

PDF

83.0 KB Created: 2021-09-03 05:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: b4e60dc5041d452f48a98248decbc2c2 SHA-1: f1b261361d6e5fd2d0cbe35146d141aa5dce2d2e SHA-256: a93309790c8ddc43d32c01340f0d655afa6b17385e3ece493bcbc1eea74492cf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm or phishing lure. The presence of these links indicates an attempt to redirect users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9911

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://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/i0d60a6nonqbcjt30a09ogec1f/kakigafer.pdf In PDF document text
- https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/26387559499.pdfIn PDF document text
- http://nuraski.pl/wsg/userfiles/16166772563.pdfIn PDF document text
- https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/732d35be4c1a83dbba7c94b871e718b3/19171086818.pdfIn PDF document text
- http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/bc27d19d82ad7588805796d0920e7ea3/nafakavekejijo.pdfIn PDF document text
- https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/mae83j1g05uhku2oj726cr7t24/bubunitapapakiv.pdfIn PDF document text
- https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/6vj9dd5iq76g2l1amfcel88f51/xofedij.pdfIn PDF document text
- https://monyetmesum.com/contents//files/96624344703.pdfIn PDF document text
- http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f04db9dbcba---belivikeduluvafagunusaf.pdfIn PDF document text
- https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/ff833cebbf872f3ad57a05d70a02ccd1/xininurizakifex.pdfIn PDF document text
- https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/vkfniib11q7m1etkefe7i05snj/31381690217.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b09e4bb30---23565734930.pdfIn PDF document text
- http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080ff3e74c08---75192455195.pdfIn PDF document text
- http://nagymester.com/userfiles/file/26155722785.pdfIn PDF document text
- http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7a2b9e1ae---85124233400.pdfIn PDF document text
- http://www.smartlandgroup.com//ckfinder/userfiles/files/kusik.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/rv543ir1imv3o98j7jdlbs00t6/43333101500.pdfIn PDF document text
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607986966ac16---24651345396.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fd431943d---96046834529.pdfIn PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610804f59a951---72603671428.pdfIn PDF document text
- http://aps-mes.com/files/file/26286482965.pdfIn PDF document text
- http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/6macos3k7esetgfsn9rh2vjr9u/54121445181.pdfIn PDF document text
- http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2737ae4c1---81985085209.pdfIn PDF document text
- https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/763e59fe31f30d488b829fe6b3f49056/4000203961.pdfIn PDF document text
- http://bajcsidavidfoto.com/_user/file/36386696917.pdfIn PDF document text
- https://arnetbilgisayar.com/upload/ckfinder/files/13190148826.pdfIn PDF document text
- https://xo-sound.ru/userfiles/file/sariwisewesokenax.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=2005+chrysler+300c+service+manualPDF 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_off0000decb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDECB	17520 bytes
SHA-256: `be6baee3e33959ba84f33987a10ff561d83c52ee6fb6df78fe21c8e2ea84df41`
`font_01_sfnt_off00010c68.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C68	11008 bytes
SHA-256: `0d778ddca0482ff323cfec46601dac794b546e4bbad3e91b019048dbd7bc0b9c`
`font_02_sfnt_off000125e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125E5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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