PDF malware analysis — malicious · c7c3f673694fe571

MALICIOUS

PDF

90.6 KB Created: 2021-07-04 02:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 5e251afa375b12986cd9bb6fef39f5cf SHA-1: 1821a2aa8feceff9247c29b12e3ec1f49ea30200 SHA-256: c7c3f673694fe571561dc01e7685480b33dfa9badd2dad8eb1797ed0d51b4ca6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate that the PDF is designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9937

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://drafthe.ru/uplcv?utm_term=value+of+old+playboy+magazines PDF link annotation
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160acfece2066e---jukurixa.pdfIn PDF document text
- http://sport-way.ru/img/file/25111159847.pdfIn PDF document text
- https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/1hh0och872b48rqlrb33g01scu/8589407732.pdfIn PDF document text
- http://angelojrobles.com/admin_initial_test/userfiles/file/valifonalakinumabonoken.pdfIn PDF document text
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ck6k96t0slbg2ab4nofan1hlce/gesiwaxodosulibize.pdfIn PDF document text
- https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090f7b0edd10---3417230570.pdfIn PDF document text
- https://adepotcustom.com/UploadFiles/file/20210506223640192.pdfIn PDF document text
- http://suacona.com/clients/16856/File/nuwoga.pdfIn PDF document text
- http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986d477214f---84321895034.pdfIn PDF document text
- http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f8437c85f---6181564434.pdfIn PDF document text
- http://atomleasing.ru/media/File/lovovewexisasajufozubafak.pdfIn PDF document text
- https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d2510a7797dd6ac6f3825299d8617ad/zilabokutibomidojadozaziv.pdfIn PDF document text
- http://k1a.ru/images/files/file/negowepesuxojapotaxa.pdfIn PDF document text
- https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/8rt8nfo1rhaeuvb2b87cuhk2bc/88893508572.pdfIn PDF document text
- http://animalscipublisher.com/files/upfiles/file/sizetexezobilamo.pdfIn PDF document text
- http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/20cfa72a555a5a165c3ec0c11de35063/jejebedifuzabas.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e52c4a307d---gadagevuburubipupov.pdfIn PDF document text
- https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/q8fltohiamdfe5nbp74d9k5mn2/lezaderi.pdfIn PDF document text
- https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b52b017ccd---tilowemefibewukaxavugomaw.pdfIn PDF document text
- http://clinicaveterinariailmarzocco.it/userfiles/files/zisisuvovogujusobiwat.pdfIn PDF document text
- http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0cffac9f3---kabikudiroxef.pdfIn PDF document text
- http://bsbcarpet.com/userfiles/file/jirujirit.pdfIn PDF document text
- http://photou.cc//ckfinder/userfiles/files/44238759465.pdfIn PDF document text
- http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/linakazepopaja.pdfIn PDF document text
- https://teyadegitimvideo.com/calisma2/files/uploads/4461263909.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_off0000ffb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFB1	16916 bytes
SHA-256: `aeccb7ab75d3535988d19aa6baf1f47dff60731a353f4782c8a5e9f700a2d23b`
`font_01_sfnt_off00012bbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BBE	11024 bytes
SHA-256: `b88f3656e7a4cb1372d69a25f255d20d3d3f56b6ebadfc42af30b2f922bbe734`
`font_02_sfnt_off000144f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x144F2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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