PDF malware analysis — malicious · 489330069c34af50

MALICIOUS

PDF

86.2 KB Created: 2021-08-15 21:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 6bcae486b373b55d504ffa18f9e47120 SHA-1: df98c8ff4df61d3078e9889b61c5def3ee5b39a8 SHA-256: 489330069c34af50ddf5c479732c37b168729bf20fc08aaff9807643d919a0a3

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9848

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/dvtjqb7v5m5sdlsc5bmgb25bm2/99651537407.pdf In PDF document text
- http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c207188906---6574128724.pdfIn PDF document text
- http://zxpgw.com/userfiles/file/58370404063.pdfIn PDF document text
- https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/2713591037.pdfIn PDF document text
- http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/57686243377.pdfIn PDF document text
- http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/mijajupasegejorerenaf.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/velrq4ljk47scdml8j5d4i4gk7/91817040513.pdfIn PDF document text
- http://daimarconstrucciones.com/images/admin/file/vitasexovewexezuja.pdfIn PDF document text
- https://aronabritcan.com/userfiles/file/kitirigurawivifezuzur.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/1524b97397e3bffec8568a471555ca99/zixez.pdfIn PDF document text
- https://la-klamm.org/Files/files/ririri.pdfIn PDF document text
- https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092105b6de4b---78099123917.pdfIn PDF document text
- https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/9853b58a821e8f3c59b5734764cc103b/juzobu.pdfIn PDF document text
- https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6db82147d2---3600854744.pdfIn PDF document text
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/t8rt07j9pan1i6fpqbjkoutnql/47743506480.pdfIn PDF document text
- http://ahkjt.com/upfile/file/55352509805.pdfIn PDF document text
- https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/6937dabd256e237074988b69d4b9d092/92551826985.pdfIn PDF document text
- http://cocoal.com/uploads/file/tigalulenu.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/b86b4c01c5b0fb25006b5e1c6bed2de3/pemejelavomufubobowu.pdfIn PDF document text
- http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160947309b0e65---dapupesuluw.pdfIn PDF document text
- http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d20d83c267f---5709423468.pdfIn PDF document text
- https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/baf7c6492bbc5675a67d8ef0b5c90cc7/bibalezobibarugub.pdfIn PDF document text
- https://conexkarvan.com/cache/fck_files/file/tuzunekuviditomevatu.pdfIn PDF document text
- http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c56e8dc54b---bexiximukixow.pdfIn PDF document text
- https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf45c5088a6---74157178055.pdfIn PDF document text
- http://em-mould.com/ckfinder/userfiles/files/sivijonamegemef.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=anonytun+settings+for+airtel+kenya+2021PDF 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_off0000ea36.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA36	17736 bytes
SHA-256: `59b690953be6b5683348129030bcfb92e32054e89ed54c458ce2293345cc77ab`
`font_01_sfnt_off0001193d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1193D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013154.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13154	10972 bytes
SHA-256: `38cc71449229b6b579f4bcae000c44a84d3618637680f133f9a315d7c6e697a3`

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