PDF malware analysis — malicious · 3081a8b0073f2678

MALICIOUS

PDF

81.2 KB Created: 2021-08-10 06:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 2f9d30cc780dace259fde7f264d017de SHA-1: 245b6d12e3b147c15c00486c9329d07c755b32fa SHA-256: 3081a8b0073f26781622f3588abc8a5278d5d470d439bd28b69b8902bbd0ad9b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/d6gfjtnbsklvldd56jqo4qf057/vurofevoji.pdf In PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/90d8bbd6eb646bec2cdb0cd96b45e331/72620317915.pdfIn PDF document text
- https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/ehg4q1j4a1tgn7dmhlfbv7ri8d/kolodiz.pdfIn PDF document text
- https://khonggiansachhanoi.vn/uploads/files/26665978325.pdfIn PDF document text
- http://ledins.lv/cms/file/2384889889.pdfIn PDF document text
- https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab0dc85c2f---42822131939.pdfIn PDF document text
- https://alatheir.com/atheirwsfiles/file/nonujisujar.pdfIn PDF document text
- https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/026d7db33e58798dacf69f7ff79edddc/tibuburotigifimivigebuv.pdfIn PDF document text
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e78ae2da63b---xojogotowulabawezusoforuj.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/magudiravebudarofo.pdfIn PDF document text
- https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f27cbfecbbd---davano.pdfIn PDF document text
- https://novzelandiya.ru/ckfinder/userfiles/files/69059270571.pdfIn PDF document text
- http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c86573c1b12---41396991571.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83c924acd5---rovutosulosilojafe.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7518591c60---lefavokuwabivarogazigazi.pdfIn PDF document text
- https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/c5lj5399hgnm9bl6e8r58mpvq4/tokivemefukugavab.pdfIn PDF document text
- http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c13877fba---43587910174.pdfIn PDF document text
- http://studiosimonepantaleo.it/userfiles/files/26250399747.pdfIn PDF document text
- https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a829ed66ee6---gowemixuxetusuwu.pdfIn PDF document text
- http://sghscsjamarai.org/guruhargobind/userfiles/file/fewumabatofabenaxanoledor.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c881b667ede---jupab.pdfIn PDF document text
- https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9b1b7d011---zijajuguparonojagujoveta.pdfIn PDF document text
- https://daaeportrett.no/upload/file/77140945096.pdfIn PDF document text
- http://fecirturizm.com/resimler/files/labotexozozoziwo.pdfIn PDF document text
- http://dissanna.com/temp/fckeditor/file/97610888781.pdfIn PDF document text
- https://funbugs.ie/files/file/levira.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+program+spectrum+remote+to+cisco+cable+boxPDF 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_off0000dadf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDADF	16204 bytes
SHA-256: `f79ed15ee70fa6cffad639dc39ac0ed5f69e55cff5d6cd36e7de9a738fafed21`
`font_01_sfnt_off000104d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104D7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011cee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CEE	11032 bytes
SHA-256: `acad9eeb06651926fdc98016ef62aa972f4c1dd67ff1bfe13adbb5ef1a7420e4`

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