PDF malware analysis — malicious · bafb445b4298b4c7

MALICIOUS

PDF

78.3 KB Created: 2021-07-02 16:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: bce366e48a7f7515ee6647ea5d4f8ec0 SHA-1: 4ef1c2a537172fa3ea53bedefa4952929c95d766 SHA-256: bafb445b4298b4c716b1cc9c72e0a14d22a3f90a6128ea70f548e7ee4d3e707b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content or phishing pages. No scripts were extracted from this sample, but the extensive use of external links indicates a primary function of directing users to potentially harmful external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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://oniceh.ru/uplcv?utm_term=6th+old+tamil+book PDF link annotation
- https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfefc87166---60462746554.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e1ab403df---fafakusowa.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/f57fd1bb335df91f491baf9d6c5f35b9/pipojetabekozananonukelat.pdfIn PDF document text
- http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/6i8l0m0bq8rjkqj4cq0cmqksa5/41515520268.pdfIn PDF document text
- http://unseretochter.com/images/file/tuzelekezisosemudinuxo.pdfIn PDF document text
- https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/bi61i7906d945bvc7cet1hcmtn/wuvofixifomidaxo.pdfIn PDF document text
- https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/f88d0aee9912a09ce4bb2f33186c7d50/duzudigovozobotit.pdfIn PDF document text
- https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c06d354441---rinikelupaf.pdfIn PDF document text
- http://kolkandkolkdesign.com/site/data/ws/files/92742616861.pdfIn PDF document text
- http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/f4d4e73640f6d397e007b1f12eb9c6b0/90239637437.pdfIn PDF document text
- https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65949d20f1---14732814364.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606dca7f4d4a2---nilibifowib.pdfIn PDF document text
- http://brandnewgoods.net/userfiles/file/bupajuferoxuwi.pdfIn PDF document text
- https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/6dd3b56f66b5410737358f45051f1767/74702473758.pdfIn PDF document text
- https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/5df108a2c028481df2d94eb444626ada/zirosubidubibedobalaxuxi.pdfIn PDF document text
- http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c65ec06de70---boxaruzukusosaxo.pdfIn PDF document text
- https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfdbc843f1---basowevilojugejuvu.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/12c77e810c740d9f227f439c26d90ace/74291756555.pdfIn PDF document text
- http://apsencollege.org/test/fckeditor/file/bovut.pdfIn PDF document text
- http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c6e529b09---32362481333.pdfIn PDF document text
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1762b904aa---suzefiviw.pdfIn PDF document text
- https://nestaerospace.com/uploads/file/34823709308.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094a7f2cdc55---35928052677.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748828aa994---28810075284.pdfIn PDF document text
- http://comp-art.ru/userfiles/file/wuvip.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_off0000d1f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1F1	10312 bytes
SHA-256: `a7095542c5161932a0763814badbf710698ee29b1ebdb35912f86fc85d613946`
`font_01_sfnt_off0000e921.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE921	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010133.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10133	16424 bytes
SHA-256: `5fc335e6dcf02f2dde080301517d9de7f8b25d2e70cf7910c1da0e0f914b713b`

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