PDF malware analysis — malicious · ecc0dcf4b669435e

MALICIOUS

PDF

88.1 KB Created: 2021-07-02 09:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 98174c62f75064e1a18c867dbc5f186b SHA-1: e7bc2cc4d237cbfa7a1b4867cff676af4d3d9eb8 SHA-256: ecc0dcf4b669435e6b2a66f65fa810c0f27279d62ad37ee0251c6c00a490e8b2

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV also detecting it as a phishing trojan. It contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to lure users to external sites for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9970

Heuristics 7

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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=sell+or+be+sold+book+pdf+download PDF link annotation
- http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087c4c484e9a---fafivunet.pdfIn PDF document text
- https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/1c29a41a61aa620abd634f0370daf746/kidupo.pdfIn PDF document text
- https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c345b04eb93---49272811067.pdfIn PDF document text
- https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/110a486babb0cf49e1b59bf9404d11f8/10077194339.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/e6f7f33b2d8415a80fd03b01e9097ae5/41073171803.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941db051eda---74911915557.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/6f77f702e535f627f0917f5391dd190a/mimanejudarot.pdfIn PDF document text
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6f3d0624a---64281719498.pdfIn PDF document text
- https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/52793ca90d424f209437ac2ea2f00233/voduzudixapojijisajaxeza.pdfIn PDF document text
- http://lateonsettay-sachs.org/userfiles/file/fesigoramezavefipixipis.pdfIn PDF document text
- https://thefertilizerequipment.com/d/files/25418958823.pdfIn PDF document text
- http://sportgalaktik.sk/userfiles/file/64371930547.pdfIn PDF document text
- https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/ac60ea6ccfe6aff70974a0d5cefc4964/13285567595.pdfIn PDF document text
- http://alnadaoil.com/userfiles/file/fadodexojo.pdfIn PDF document text
- https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d3a3a9884---11950222580.pdfIn PDF document text
- https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3036c830ce---zijowinedasevuxojub.pdfIn PDF document text
- https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ek1a3rs90u7nc31m4chpns61a3/49433914706.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079885573026---fijijaxadofagetokijodivow.pdfIn PDF document text
- https://itchanoi.vn/uploads/news_file/nofilu.pdfIn PDF document text
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1d5379ef3---razipivotasikinexujo.pdfIn PDF document text
- http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160da36174a601---kojazesilaz.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_off0000f5f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5F0	10696 bytes
SHA-256: `3326fcf4a7cbe2de58ca4d2ea56607542b46e3eae4368cdd07e09d125659955b`
`font_01_sfnt_off00010e71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E71	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012683.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12683	17228 bytes
SHA-256: `550ab5d62840253e26af918ea392d1134195ec3a09adca66dc001a05d97f4999`

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