PDF malware analysis — malicious · 2284b5ed7bf843c2

MALICIOUS

PDF

86.7 KB Created: 2021-07-16 05:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 2f5c28621c43dc8e71abcbf3022416a6 SHA-1: 944432e18d69e61f8883fea19ccb989523c507ca SHA-256: 2284b5ed7bf843c26977ee1ba64618fa8fe262bd1e0f73349333c63585ac6391

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or use URL parameters suggestive of tracking or redirection. These links likely serve to distribute further malware or conduct phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://huntic.ru/uplcv?utm_term=the+chimp+paradox+chapter+wise+summary PDF link annotation
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9db4ac746---97822134958.pdfIn PDF document text
- https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1e78a04c2---bilopar.pdfIn PDF document text
- http://servmed.net/userfiles/file/siweguropunetiwibejigur.pdfIn PDF document text
- https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/1acmqeu92fvonmcdk2um2ki00s/85309560191.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ef9c38bdb---misakivopaxot.pdfIn PDF document text
- http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce85d964225---36880374484.pdfIn PDF document text
- http://conblocmanado.com/pics/file/pimibovexifupa.pdfIn PDF document text
- https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/08a640111c3c3d5f30fe033ab7a8df53/43244515132.pdfIn PDF document text
- https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/6ceb3efbcf64127020b429f5133a0b1a/88676130294.pdfIn PDF document text
- https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160960b8b7de24---52848973343.pdfIn PDF document text
- https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/qig0ns2g0at6cakgv8iimp9it4/wezisasulepimitutijapador.pdfIn PDF document text
- https://drrajanmahtani.com/userfiles/files/59340720127.pdfIn PDF document text
- http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fe009d923---waferivufikinizofag.pdfIn PDF document text
- http://straub-online.ch/userfiles/files/53969984175.pdfIn PDF document text
- http://teplolux72.ru/upload/file/54841007874.pdfIn PDF document text
- http://jacksonreunion.org/clients/71346/File/32200552977.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608c24846b914---fededenetegepumazop.pdfIn PDF document text
- http://quiltingacademy.info/fckeditor/userfiles/file/tilusujud.pdfIn PDF document text
- http://jngf.cn/files/file/pofupatigaramakunulafuput.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a861795655a---ruzefo.pdfIn PDF document text
- https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d062a64d38---guzirozusazebisuxef.pdfIn PDF document text
- https://bandotrading.com/uploads/file/9445406548.pdfIn PDF document text
- https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/1b8505b0edeb2b3de972c9ee11cadbd5/wubusofi.pdfIn PDF document text
- http://mmckno2010.zkosuchdol.info/files/lovanijemabefe.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_off0000ecab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECAB	10992 bytes
SHA-256: `d68c9539202e9c268455dc6ee2995321779035b6aef7ccff201aecb679ba2204`
`font_01_sfnt_off0001064f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1064F	17336 bytes
SHA-256: `a75f6b558d7ce8c8e592a61e4d1698a9fc6f3714a35fcecd166f160606a12e87`
`font_02_sfnt_off000133e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133E3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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