PDF malware analysis — malicious · c7401210a99551e8

MALICIOUS

PDF

70.8 KB Created: 2021-09-07 04:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: eb82ee9795c84947127951b5afb8fee0 SHA-1: 2e9a8049cdea522223d0a36675db4c0d3d66af62 SHA-256: c7401210a99551e883af5cfca0179b10da00acd26cce98e6f59bdc99a1ebdb45

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f22014cf296---fubuz.pdf In PDF document text
- https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/a7b9a6fa67711b59a11d075acec17a80/32358212939.pdfIn PDF document text
- http://kemenyseprosiklos.hu/upload/file/banejebutidedatupafopuduf.pdfIn PDF document text
- http://nenkin-t.com/upload_img/ck/files/bunobujuwubanozixefij.pdfIn PDF document text
- http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075f1c4b74a1---80831173670.pdfIn PDF document text
- https://gruntbudowa.pl/files/file/93826352231.pdfIn PDF document text
- https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/2dbe0h5qa8ocjm3udcmgjhrou0/98439198440.pdfIn PDF document text
- https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/01juqj32fkv7acc4i8e6ijt597/10200053971.pdfIn PDF document text
- http://pneusmarene.it/images/file/9230190543.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f3b891afb72---nuxoropumi.pdfIn PDF document text
- http://farmaciafici.com/userfiles/files/67220478536.pdfIn PDF document text
- http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b061e865a0d---vuvadafogipisod.pdfIn PDF document text
- http://obraz-tlt.ru/userfiles/file/664583627.pdfIn PDF document text
- http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b48873256b---sujesivanabu.pdfIn PDF document text
- https://mygrind.ie/userfiles/file/80021730801.pdfIn PDF document text
- http://xn--h49avwqct32ewe967crscpsaz7d.com/ckupload/files/33723067040.pdfIn PDF document text
- https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/qc1v08hqvbebcak9op1q1r0bca/65035616262.pdfIn PDF document text
- https://hunghiephuylog.com/upload/files/mobovefo.pdfIn PDF document text
- http://adasbruiloften.nl/userfiles/file/nekamomirudabinafo.pdfIn PDF document text
- http://sudeoksa.net/userfiles/file/20210826195058.pdfIn PDF document text
- http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/d004515f6072755b6552223133ce5f4e/35377958402.pdfIn PDF document text
- https://skvely-kup.cz/files/file/4343944489.pdfIn PDF document text
- http://massarentearchitettura.com/userfiles/files/79162728958.pdfIn PDF document text
- https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/9b88fab77c279c24529ddc5148ff9525/40926937375.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=marathon+training+tips+pdfPDF link annotation
- 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_off0000b5c5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5C5	10592 bytes
SHA-256: `8990f90e7957d1f3c52a00e98e836d9fb9ffcc4c68679bf16c01ecd5ae3a5bcd`
`font_01_sfnt_off0000cdad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCDAD	15676 bytes
SHA-256: `668ab5f5fde9a1fb1882f286f2b8abded6019b2db991f1c9024606141b6ec6db`
`font_02_sfnt_off0000f5bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5BD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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