PDF malware analysis — malicious · 925eaf1a5aed2d29

MALICIOUS

PDF

83.8 KB Created: 2021-07-01 21:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 1b535c547f82bb51ea56cb1e04162eb6 SHA-1: 6fa64b2925bc6aa7f423d49b09640fb98b2c2647 SHA-256: 925eaf1a5aed2d294216dbee538df4aaf7d730a1f3b379e6b211c7a1685078e4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains malicious content. Heuristics reveal it functions as a link farm, with many URLs pointing to potentially compromised websites or disposable domains. The presence of external URIs and link farms suggests an attempt to redirect users to malicious sites, possibly for phishing or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://bataretak.com/img/files/file/pizuvizukileriteredez.pdf In PDF document text
- http://rosesrealtyhomes.com/userfiles/files/wokirokefokakiveta.pdfIn PDF document text
- https://gea99.com/ckfinder/userfiles/files/10620373751.pdfIn PDF document text
- http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b406b9352aa---mitabasi.pdfIn PDF document text
- https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/1f0a67c3cdb686854372ab30f79141a2/wuguke.pdfIn PDF document text
- https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9ef611913---nowijipan.pdfIn PDF document text
- https://takipcisec.com/calisma2/files/uploads/xujuluramotep.pdfIn PDF document text
- http://drukarnia-skawina.pl/app/webroot/media/files/dogoxomaguxalale.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pq46rcrotg1g7p4tsriuikumu6/mezuwulokexofivuxukegona.pdfIn PDF document text
- https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/223da16601688ee22342ef80031a7eeb/guriromijetuv.pdfIn PDF document text
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16070a7ccb6b78---zewupi.pdfIn PDF document text
- http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/18918851866.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/5bef6bc0c965d100c72e8265c9f3b0ab/66655068134.pdfIn PDF document text
- https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/fdcd26116cc56bd36e7d6893250bff5b/18344195667.pdfIn PDF document text
- https://taxiporec.top/wp-content/plugins/super-forms/uploads/php/files/fjnndkttd0qa9ub6r1lgdcldnd/22668957417.pdfIn PDF document text
- https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/qeu4hhvg1uhfk83hhqj0lua8rj/kovajesujibaxiwefevepet.pdfIn PDF document text
- https://genegurumiraclehealer.comuserfiles/file/pixixenixulurejuloru.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b54e59f40---puner.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608828f25797d---xudukizivosowabadozefaxuz.pdfIn PDF document text
- http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160803ef0048d9---4972828780.pdfIn PDF document text
- https://bandotrading.com/uploads/file/winodopiko.pdfIn PDF document text
- http://salkim.com/userfiles/file/82035543739.pdfIn PDF document text
- http://malopolskiszlakwinny.pl/upload/File/gunotijagumiguzekurotewej.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947a3086327---lijimononimamulabupenad.pdfIn PDF document text
- http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/873ed8e4c0962b64fd4880c21bafbf2e/vokan.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d11c404001665416d5c3f4317a1806ff/96108955046.pdfIn PDF document text
- https://stbenedikt.ch/userfiles/files/tebedasupepokatebifera.pdfIn PDF document text
- http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5626f1557---93215017471.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+make+dark+red+acrylic+paintPDF 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_off0000e4ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4EE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fd05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD05	10792 bytes
SHA-256: `196e9e10e1bfd9d8bfe5451b1ee79dd873c915ee6476d39033b0e89eff1a642d`
`font_02_sfnt_off000115d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115D3	16740 bytes
SHA-256: `1f85afa6c632dcdff99974d5c371b0b5f931b9a8bcef0ddac9b26fe1936eb98e`

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