PDF malware analysis — malicious · e07b089a1f873761

MALICIOUS

PDF

90.5 KB Created: 2021-07-08 03:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 960e3d33638dca2d7e4b71fa9860cd86 SHA-1: 1d67a956fe4a56a38a0819fe90e6fea877008c9d SHA-256: e07b089a1f873761689d8414727317bdbbf4a469f8b1b762859d995f3d090f0f

176 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, potentially leading to further malicious content or phishing sites. The 'SE_CALLBACK_LURE' heuristic suggests the document's content is designed to prompt the user to call a phone number, a common tactic in tech-support scams and callback phishing operations.

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
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://marljivo.hr/UserFiles/files/33842110879.pdf In PDF document text
- http://assessmentinsight.com/ckfinder/userfiles/files/livuge.pdfIn PDF document text
- http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/03d79953dc0e971011e09f22ef1680db/setumetijelovejote.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7eb9cc0f2---potekopetisutosim.pdfIn PDF document text
- http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/devosebopo.pdfIn PDF document text
- https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/sa2m3cmi0ke7ts5e2f647eils1/87837929044.pdfIn PDF document text
- https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/bbs5cd0d13tdbf7d2u5eqpvcri/3533487105.pdfIn PDF document text
- http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bccbee455e3---mavojopaxunuvovilisedive.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3b6536e558da397ff995225c9ea5c8fe/86898736315.pdfIn PDF document text
- http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160824dc6338a2---rawagi.pdfIn PDF document text
- https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/r137n7iht0vpl8voku470hp36d/bepirafubojulisoz.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b625f24e94b---xesogulel.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f8548532a---38867390102.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/fd58dd304ec803fb750100dc3b8a5698/1073933177.pdfIn PDF document text
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e55165924b---duvesetuko.pdfIn PDF document text
- https://arte-salon.ru/upload_picture/7465458110.pdfIn PDF document text
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608137ba34e3f---37222465334.pdfIn PDF document text
- https://myvideoclasses.com/ci/userfiles/files/9525948224.pdfIn PDF document text
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c404a889a7---77720719906.pdfIn PDF document text
- http://reikihaus.com/clients/75291/File/72213019554.pdfIn PDF document text
- https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/0da21d900654555e165e6938d276e232/71194877070.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/aa42125fa7a89386679474bb3fdf0c27/79481513999.pdfIn PDF document text
- http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/9f8a1eb5ed5f0e81903c5386a22145b8/99179603347.pdfIn PDF document text
- https://nestaerospace.com/uploads/file/6164229079.pdfIn PDF document text
- https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/d284d6098290162e44e5271d8369a88a/vodilebaluzalo.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ac+joint+separation+treatmentPDF 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_off0000fe30.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE30	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011647.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11647	10600 bytes
SHA-256: `7ebd929846a2c5f8e120a0221d6c8cadbb060e0d89ce8f1e671f7164d789a107`
`font_02_sfnt_off00012e78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E78	17576 bytes
SHA-256: `36903f940ef08ccd68edb0d563e18c24c944a239c91b2e62b6fa0fc5d521cd7f`

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