PDF malware analysis — malicious · 7ea89b224b4b8479

MALICIOUS

PDF

82.9 KB Created: 2021-09-03 20:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 865d42faf0b3557ded62ca73d9b596b9 SHA-1: 7af64467fd6208b34e8fd167b757e7f0bed07a63 SHA-256: 7ea89b224b4b8479ccda725e8e0057650367514126cb27e9b5dd312f7a7df235

156 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 detecting it as a phishing trojan. The file contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm to distribute malicious content or phish for credentials. No scripts were extracted, but the presence of external links and the overall detection profile indicate a malicious intent to redirect users to harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://inwebjor.ru/uplcv?utm_term=manualidades+con+botellas+de+plastico+porta+l%C3%A1pices PDF link annotation
- http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/hdrqg3l1sf6c44k3l34rck8ad5/nodemujulipopunavese.pdfIn PDF document text
- http://centromp.it/userfiles/files/5476481783.pdfIn PDF document text
- https://getadoc.in/ckfinder/userfiles/files/merapowubiladetowelo.pdfIn PDF document text
- https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f8cedb9e8---41195613981.pdfIn PDF document text
- https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/e0559638a5b652a0e66ca268a005e9b3/98114950903.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d6aa500c595---rutujejusipadevuzebut.pdfIn PDF document text
- https://chiataiec.com/userfiles/Proj_Name//files/59685886903.pdfIn PDF document text
- https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/3927d5708d106dff02941f4b9f06345d/tafite.pdfIn PDF document text
- https://asken.as/bilder/file/3301771666.pdfIn PDF document text
- http://homestationrealty.com/userfiles/files/sabokopitijifikak.pdfIn PDF document text
- http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc7990ecaa---pefise.pdfIn PDF document text
- https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/71s57j0q3mlilossnaimuspvap/delikidakolozawuv.pdfIn PDF document text
- http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160f7feb1a3c6d---kipawoguvasefaxesudem.pdfIn PDF document text
- https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/de2d63e5277acc03b72e2fe7b279a7bd/74430706621.pdfIn PDF document text
- https://beruanglucu.com/contents/files/poveledumetelekami.pdfIn PDF document text
- http://smart-ventures.ch/upload/Editor_Images/files/gulewip.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/f0il2tre0tfnu84ji2gk61scd7/zowefirox.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/919039314fe09de32722e87a962233da/2621004682.pdfIn PDF document text
- http://sevimticaret.net/userfiles/file/tukis.pdfIn PDF document text
- http://gutachterbewertung.de/userfiles/file/dagugitovituvarebaruxene.pdfIn PDF document text
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e71089bb8c---tojipelu.pdfIn PDF document text
- http://peetersinstallatietechniek.nl/upload/files/71470219781.pdfIn PDF document text
- http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078db03e68b8---kegoki.pdfIn PDF document text
- http://silver1979.com/upload/file/35586525645.pdfIn PDF document text
- https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/ca1fdec9f0bbcb3af481fd4664a70528/77088182615.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_off0000d86a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD86A	10920 bytes
SHA-256: `9af2e9ca64f9f5dbbd70a52f399231b080e9265dbda55dbc5f8059d0113885d9`
`font_01_sfnt_off0000f12a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF12A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001093c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1093C	19692 bytes
SHA-256: `48b28049bc7d37c1c461f7dfb723a003764e31d650d2d4e28fb1eaa75587baf6`

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