PDF malware analysis — malicious · 8ec7d9802e9e6ae2

MALICIOUS

PDF

74.4 KB Created: 2021-09-21 02:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 5cc3168fb98bfc0bee8c4d18afde2342 SHA-1: e34c514f71573eea2ccfdc868f1563efd74729cb SHA-256: 8ec7d9802e9e6ae2aefce55ed33c02540b40c9c3d2edf8ddf8caea38d16513a4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, suggesting it functions as a link farm. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://coretry.ru/uplcv?utm_term=characteristics+of+the+music+of+the+classical+period PDF link annotation
- http://arebiatours.com/uploads/files/4869200655.pdfIn PDF document text
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/4270d3c131f95ced68956b94a7ecacc3/domipunufusariko.pdfIn PDF document text
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161427bbaf35aa---55498094115.pdfIn PDF document text
- https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/e4cae7b429bac661133bf417ba84ea20/39135352584.pdfIn PDF document text
- http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf66487d18---9445872939.pdfIn PDF document text
- http://cableesmaltado.com/d/files/40624604975.pdfIn PDF document text
- http://www.maderas-navarro.com/ckfinder/userfiles/files/famubora.pdfIn PDF document text
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161376eadc5e77---89037562474.pdfIn PDF document text
- http://www.plain-pied.com/editeur/ckfinder/userfiles/files/xogojonupaporu.pdfIn PDF document text
- http://ppfi-online.com/userfiles/file/lokige.pdfIn PDF document text
- https://pima-alarms.net/slicice/file/27512128716.pdfIn PDF document text
- http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/95224809316.pdfIn PDF document text
- https://cnn-logistics.com/asset/files/46159846156.pdfIn PDF document text
- https://mygenius.ru/admin/ckfinder/userfiles/files/53607212114.pdfIn PDF document text
- http://lube-stc.com/ckfinder/userfiles/files/misovizolosibore.pdfIn PDF document text
- http://clinivetmadonnadirosa.eu/userfiles/files/sibeg.pdfIn PDF document text
- https://tsegypt.com/file/vumuvepomojen.pdfIn PDF document text
- http://orderleesushi.com/uploads/files/55468140411.pdfIn PDF document text
- http://smartpaintingplus.com/userfiles/files/47717181711.pdfIn PDF document text
- https://novamakine.com/upload/ckfinder/files/13502405357.pdfIn PDF document text
- http://rintoyo.com/userfiles/file/jenijadox.pdfIn PDF document text
- http://ferrocom-spb.ru/userfiles/files/wikojumewulubomow.pdfIn PDF document text
- https://snoman.mb.ca/ckfinder/userfiles/files/vopuvukemi.pdfIn PDF document text
- https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce3d19388a---66374313886.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_off0000c08c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC08C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d8a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD8A3	10912 bytes
SHA-256: `fbcd320e6076c3dd701969a85b7b874edcdd6c1c02d59422ddd3aec6a8897ac0`
`font_02_sfnt_off0000f1eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1EB	16344 bytes
SHA-256: `22b390656c4718f67c96fc9b79a59ac6c6dda0aca0f7f87c5cf7177dd73b66f7`

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