PDF malware analysis — malicious · 1899f75ad47c48da

MALICIOUS

PDF

231.6 KB Created: 2021-07-21 00:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 92f9992ff79b0713549adb5804c8d933 SHA-1: 4d0c702b157d077dd70f42d521f6018a01feb640 SHA-256: 1899f75ad47c48dab11586337e59ccbae3e8eb8e64a7d9d184f387ccb27d2eaa

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, with at least one pointing to a compromised WordPress upload directory, suggesting it's used to host or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with phishing or malware delivery campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9852

Heuristics 5

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.
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://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/hphii94372johvn8ig55k53sd0/19502093556.pdf In PDF document text
- http://driver-jazda.pl/upload/file/80726540605.pdfIn PDF document text
- https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/f65b9409c5145a104fb898e29bcc3251/16366685809.pdfIn PDF document text
- https://festival.bg/fckeditorfiles/file/saxuso.pdfIn PDF document text
- https://eminencesolutions.in/resources/userfiles/file/35297059634.pdfIn PDF document text
- http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/tidufafikoxa.pdfIn PDF document text
- http://forter.vn/hinhanh/file/dobuvem.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc77589d5---39541963175.pdfIn PDF document text
- http://drsuthichai.com/userfiles/files/40477309611.pdfIn PDF document text
- https://churchofgodinjamaica.org/app/webroot/files/sasaki.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/v3518j3q7v89e598sl74t79k18/3574831819.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/5dbdadf7f0ffc2273d4c1941901f8b51/18378948622.pdfIn PDF document text
- https://cgeminfos.ma/upload/file/faxuwidukin.pdfIn PDF document text
- https://burstallconrad.com/editor_files/file/17468837046.pdfIn PDF document text
- https://marljivo.hr/userfiles/file/varosoduwafipisigifubav.pdfIn PDF document text
- https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/g7f4dpv9ds7p7di0qval7nsq44/diremugo.pdfIn PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa15f06c4e8---ruxofujuwetuzikepoxof.pdfIn PDF document text
- https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/vja1od8fhq9l13qs44hmhc7o11/pewok.pdfIn PDF document text
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094f1aee5334---67758524327.pdfIn PDF document text
- http://aite-materials.com/upfiles/file/66933391081.pdfIn PDF document text
- http://st-communications.com/ckfinder/userfiles/files/rukekitosewodasasolifa.pdfIn PDF document text
- https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/gr1jkugh75o0avcamgfona4ne5/napejaki.pdfIn PDF document text
- https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/svrpp5dol11m5di9ebrhh228v8/42146152732.pdfIn PDF document text
- http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/86efc80493db557a5154cd0f2b114c05/71643519350.pdfIn PDF document text
- http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/6cd129783ecd52da18d029915af95020/mudolug.pdfIn PDF document text
- http://vstarmp.cn/upload/files/20210614_205806.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=strength+of+material+book+by+singer+pdfPDF 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_off000324da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x324DA	11364 bytes
SHA-256: `a4aac852f7ed5d33dc2cc83a8bbfd024310e36dbcef64a935f9e81232257fd0e`
`font_01_sfnt_off00033f01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33F01	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00035713.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x35713	21104 bytes
SHA-256: `48fad07b079c17517cebb9e831b966472e4093b58aa2c60887c6334f3f60528e`

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