PDF malware analysis — malicious · 2c6eb96abde5044f

MALICIOUS

PDF

86.9 KB Created: 2021-07-31 00:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 30897c0f89bc1c865411ee6d114c2ce5 SHA-1: 275208ad51abfc247016a07f42519b92847debc3 SHA-256: 2c6eb96abde5044faf6cb9bb855dde4fd0603ae50ea71f0e7aef5849173f060f

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It functions as a link farm, containing numerous embedded URLs that point to compromised websites, likely intended to lure users into phishing scams or malware downloads. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a pattern of using compromised infrastructure for distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

Heuristics 7

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://synerhu.ru/uplcv?utm_term=how+to+use+petsafe+shock+collar+remote PDF link annotation
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/go6m1u7mdvqmmaelababvrtnpv/4827919499.pdfIn PDF document text
- https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbd5e9ca26---gidunitujibawusagajilin.pdfIn PDF document text
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/301444540c9b1f6da9028ae978d402f0/keninefokabadufijoba.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/b1c92b67b07bac59ac7c1faa9759532c/polidurelisugogesezagatem.pdfIn PDF document text
- http://ibb-online.ru/f/file/nurewexegamubibe.pdfIn PDF document text
- http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b3f49decf---73600448412.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/e7bc1a39393eb063cecc4973b2959805/66006572263.pdfIn PDF document text
- http://www.truca-taoules.com//ckfinder/userfiles/files/lonobawaxigitunu.pdfIn PDF document text
- http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ecbe25da4---93882248791.pdfIn PDF document text
- https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f47a54fcb---tobonazabapegape.pdfIn PDF document text
- http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608186735b7df---zopibidanizibukipaboj.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609adbc761d08---puwalupubive.pdfIn PDF document text
- https://yuss.it/file/jovarixoxum.pdfIn PDF document text
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0e873d926f---5465219912.pdfIn PDF document text
- https://saam.vn/images/content/file/sepira.pdfIn PDF document text
- https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/bf2aed763fae68414c47423b8c3bc9ad/12969295617.pdfIn PDF document text
- http://af.ssla.ru/images/fornews/files/36583954460.pdfIn PDF document text
- http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905862562c3---50501019108.pdfIn PDF document text
- http://linkipt.com/_UploadEditor/files/8759071004.pdfIn PDF document text
- https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/70830d7nnci4mdgbh9cjdu3fl2/mefisu.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca79ecf32c---bolutamadulexunulasi.pdfIn PDF document text
- http://massimosusto.eu/userfiles/files/momasobuzox.pdfIn PDF document text
- http://naturallabs.de/userfiles/file/pemukijepivej.pdfIn PDF document text
- http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a705fb87877---11912487297.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ee444bbddb0b824ce4cc962e0c7b1c17/4321854838.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_off0000ed4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED4E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010560.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10560	18208 bytes
SHA-256: `fd7136a977565314581cfb621c52f4168f95aa8b732c4d78eea93a413ffb536e`
`font_02_sfnt_off0001351b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1351B	10820 bytes
SHA-256: `8319c19173a7475baa5d8c10fcfcdacb19e32996cb06e752ead31921a0ceebeb`

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