PDF malware analysis — malicious · 3ae3f394e6d67724

MALICIOUS

PDF

74.7 KB Created: 2021-05-08 16:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 810b1c12ed7fcfcf3573ea8482355708 SHA-1: 069c446e5f0285bde614043fa58666576ae4cc70 SHA-256: 3ae3f394e6d677245fd9ae0999bcfd41c8a1f3db2b6e7db73befec2bc2cd975d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to distribute malicious content or phish users. The embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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=ontario+auto+insurance+policy+form PDF link annotation
- http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083abad8e57e---raxevivazixu.pdfIn PDF document text
- https://airflow-skateboards.com/upload/file/jatavukudepigasoxuwefas.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a094d11ef---kimamiparumutevamawewa.pdfIn PDF document text
- https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/6fef79cee27bca78b1e0293a1f82f2bd/86919937447.pdfIn PDF document text
- http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082de3a9e816---59795290092.pdfIn PDF document text
- https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/4a22e4ae1937c7afb3a133cc7843c4ab/40974352737.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee021ea682---gitupezatagasozepa.pdfIn PDF document text
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607061a6493c2---98605491212.pdfIn PDF document text
- http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/63294927000.pdfIn PDF document text
- https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/388j6lqumlmd6etacai2ngreqt/12406045471.pdfIn PDF document text
- http://astro2sphere.com/admin/images/file/38127871527.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f57e02d9ab---muginexa.pdfIn PDF document text
- http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b1640b7af---tofilulapaganukeres.pdfIn PDF document text
- https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/sj6slincikf7q69f2u2pia8mh4/pexolowujale.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e110.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE110	5172 bytes
SHA-256: `dc013a043d2590bda4dc7162cc6a4c8274016312f35837ec490873c43f177cd9`
`font_01_sfnt_off0000f296.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF296	10040 bytes
SHA-256: `ee6013b76a9fab227639f757f9a933a8e799f8357c58d57a51f1440454034319`
`font_02_sfnt_off000114d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x114D7	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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