PDF malware analysis — malicious · a69cb0605f9f9a6f

MALICIOUS

PDF

79.7 KB Created: 2021-09-19 10:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: e0a7b4cb80993d117415b486921d248f SHA-1: 0776ad51e3dd1671dcb05a82b5d2d2248649910d SHA-256: a69cb0605f9f9a6f0d0fbb6fd4f77cafe3105bcb33563eae250f55e4ebf4d8c8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous external URIs suggest a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9967

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://pixomot.ru/uplcv?utm_term=wrong+turn+2021+download+480p PDF link annotation
- http://servicedental.it/userfiles/files/damepibimolesapow.pdfIn PDF document text
- https://kluchar.net/klucharnet/images/file/xavisi.pdfIn PDF document text
- http://mapect.com/upload/fckeditor/file/durolukumaziputowokufuja.pdfIn PDF document text
- http://toszegisuli.hu/userfiles/file/10212004622.pdfIn PDF document text
- http://citescolairedeledit.com/include/file/radoli.pdfIn PDF document text
- http://www.singchai.co.th/ckfinder/userfiles/files/guwilenedaz.pdfIn PDF document text
- http://agrion.org/upload/fichier/75722468859.pdfIn PDF document text
- http://waterlootour.com/FileData/ckfinder/files/20210906_5BD742B1DD90B3AA.pdfIn PDF document text
- http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1d487e080---72457327876.pdfIn PDF document text
- https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/6e8fcd53a3aad0eb55e935f0f284f039/bigubuzogabibiga.pdfIn PDF document text
- https://uzsienis.cvzona.lt/resources/img/files/tanom.pdfIn PDF document text
- http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/21b6d43c6553772097ab1a802d8714f7/2443432168.pdfIn PDF document text
- http://anindecor.pl/files/file/sukewesofajefopetas.pdfIn PDF document text
- http://civicwomen.com/ckfiles/files/wesibotokesozewa.pdfIn PDF document text
- http://ccsctda.com/ckfinder/userfiles/files/20210919_150533.pdfIn PDF document text
- http://skncn.com/u/files/zumavipikoxuzozeromu.pdfIn PDF document text
- http://proximeo.com/ckfinder/userfiles/files/68312805841.pdfIn PDF document text
- http://pokebarslo.com/uploads/files/70050503695.pdfIn PDF document text
- http://psychanalyste-gard.fr/ckfinder/userfiles/files/jilikinepaga.pdfIn PDF document text
- https://specializzati.tecnaevolution.it/dataload/ckupload/81879671650.pdfIn PDF document text
- http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1614009db6b33a---72327221630.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://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_off0000d0af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0AF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e8c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8C1	20096 bytes
SHA-256: `329afd9d4cb288d8567073bdce95487fc5b8cebcd11370862958783189506075`
`font_02_sfnt_off00011cc3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CC3	10932 bytes
SHA-256: `7528506e10e2bef115cc16631d6c5011926417dc370f13615ccfefae4f772936`

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