PDF malware analysis — malicious · b0d9830bb4817b82

MALICIOUS

PDF

70.8 KB Created: 2021-09-06 16:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 760857c9492bdc6c56765066c4a691bd SHA-1: 806d4e59e0fc2a61680a6becdaa3346ca20ba466 SHA-256: b0d9830bb4817b8214dcf734a1d4a5bbb176b11f69d7a5d7a671dc6050a0b1c4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://nomylo.ru/uplcv?utm_term=test+psicotecnicos+figuras+resueltos+pdf PDF link annotation
- https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/1bl6idm4t4b41u11efvol4usu1/xelunarumodajuj.pdfIn PDF document text
- http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097074556f4d---57899422081.pdfIn PDF document text
- http://soncongnghiepjotun.com/media/ftp/file/xofedofadinobifetuju.pdfIn PDF document text
- https://iwnta.com/userfiles/file/bikujerofukusevonu.pdfIn PDF document text
- https://anmimar.com/royal/userfiles/file/riketejojowemozexaforidox.pdfIn PDF document text
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/soqb477mlr3v7mtt0tm3klcmgq/14488945807.pdfIn PDF document text
- https://aedwea.com/upload/foto/72864975919.pdfIn PDF document text
- http://loveperfectionschool.com/upload/file/zamujaranapekebipexudob.pdfIn PDF document text
- http://e-hematologica.pl/users//file/38951534651.pdfIn PDF document text
- http://tuvanthanhlapcongty.biz/upload/ck/files/71522248893.pdfIn PDF document text
- http://thuduchouse.vn/pics/file/17847847436.pdfIn PDF document text
- https://pensiuneavalentina.ro/app/webroot/file/mutuvilazugugojumawol.pdfIn PDF document text
- https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/d662a8bc0d1e6b9543b12c03b1bfa796/76939309570.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16081429562afa---89966917265.pdfIn PDF document text
- http://www.evisiontiendaonline.com/ckfinder/userfiles/files/zuwosusosa.pdfIn PDF document text
- http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/nuruxameduxawosu.pdfIn PDF document text
- http://111-orte.de/testarea/cwsCMSlight/media/files/jalodip.pdfIn PDF document text
- http://highendschmiede.de/highendfiles/file/54464099102.pdfIn PDF document text
- http://xn--eyt274i.com/upload/files/tuxaxexotodafirigalulad.pdfIn PDF document text
- https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/eudrsm8gtcpf79p060adlanvdl/84154597210.pdfIn PDF document text
- https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/2aba7e735d2ead79919baa7f2fa4d427/38982132386.pdfIn PDF document text
- http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/a792a9c10099660f8b9e8508637f2b2d/pilatoganuxok.pdfIn PDF document text
- http://reicar.dk/userfiles/file/jabumijowubapa.pdfIn PDF document text
- http://spamsmsgiare.com/media/ftp/file/1184086821.pdfIn PDF document text
- http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b0941277d---vonewuvako.pdfIn PDF document text
- http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16130f5fb72b46---darikozu.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_off0000b5ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5BA	15180 bytes
SHA-256: `02f3539b9aec15c5547508e253e8eede291d2f263c874be38c1ed99f44102b8e`
`font_01_sfnt_off0000dad7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAD7	10860 bytes
SHA-256: `71f37187e3d8e4fa1e684089faba9df2497de6c6450b34b277ceebc9f449b21b`
`font_02_sfnt_off0000f3dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3DD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.