PDF malware analysis — malicious · 73a73f629361a5bb

MALICIOUS

PDF

76.4 KB Created: 2021-09-02 20:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: e381e6434e64f06cab179454f9efd24c SHA-1: 21cb4d0599df6fa2497687de75bad836091d80f8 SHA-256: 73a73f629361a5bbc9682f20d32ffb4b305f0741dd911ad346aadd8f6709fa35

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 identifying it as a phishing trojan. It contains numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm intended to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a likely phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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://pixomot.ru/uplcv?utm_term=list+of+verbs+followed+by+gerund+and+infinitive+pdf PDF link annotation
- https://alkathirilaw.com/userfiles/files/74197444369.pdfIn PDF document text
- http://progfin.pl/userfiles/file/31363459319.pdfIn PDF document text
- http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/079f65fbd534aa0ec267f1045cd5c2d4/tagajedebenajudesijezod.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbda9238b2---zazikararusaxavolafovexav.pdfIn PDF document text
- http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f80bcc1454---kopiv.pdfIn PDF document text
- http://tamlaproject.com/userData/board/file/7320657397.pdfIn PDF document text
- https://nadinerogger.ch/userfiles/files/dajezefoxutukilax.pdfIn PDF document text
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2349302e4d---86005258743.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b24788ae20f6dd5650342574bf84831e/4311506192.pdfIn PDF document text
- https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faafd1b4639---supifupafipeninikogugum.pdfIn PDF document text
- https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d7c77ff68---fufedafaw.pdfIn PDF document text
- https://satybharat.com/ci/userfiles/files/regivoluperunojijusapiva.pdfIn PDF document text
- https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795debaa39d---zexukipuromiwaxepa.pdfIn PDF document text
- https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/ak56dc0gr7kuv6eosjiclj56b1/fitek.pdfIn PDF document text
- https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f28b6a19c---favazidezilokuzikaro.pdfIn PDF document text
- https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/3t2fqbi8ggpedqi51h0sm56ce2/18587827923.pdfIn PDF document text
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/lf2329q9vtoef1j6rs5uc1u495/kusazolemamogutozanef.pdfIn PDF document text
- https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/h0i2vd1huke88ru3tspjjjd086/monidawegufifuwe.pdfIn PDF document text
- http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077041fa05cd---poxopadi.pdfIn PDF document text
- http://cerescommoditiesltd.com/Images_upload/files/80211511999.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16093e98db5a1e---74771958554.pdfIn PDF document text
- https://marblobath.com/app/webroot/img/files/48946654506.pdfIn PDF document text
- https://a2designbg.com/userfiles/file/38964124039.pdfIn PDF document text
- http://markaz-e-durood.com/EditorImages/file/91324794062.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_off0000c499.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC499	17536 bytes
SHA-256: `c3415d66df0b8dd78d8f3d536bae24d1cc9d03d7e6e78bbde150c490bbe1b10e`
`font_01_sfnt_off0000f15c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF15C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010973.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10973	11136 bytes
SHA-256: `45c6aff9a825501bb03dfd56e253db8b2b7689587b26d54bd728f698b5ad1aa5`

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