Malicious PDF — malware analysis report

Static analysis result for SHA-256 444e077a826a7f96…

MALICIOUS

PDF

77.8 KB Created: 2021-09-06 09:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d9e3eda4fc46fe230552dad1a21f2d8f SHA-1: 5dd8eb0167c7b7a8f5f6efced5a4e3cdf814c01c SHA-256: 444e077a826a7f9668dcf7015767298bd0a50d391090eed1586574feea883000
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while numerous, are the primary indicators of this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160d670264f856---luvukezapazi.pdf In PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/11e538721e3120bc984fabcb25813043/kefapabepubasovaxadow.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/d87b3d2af8eae351d728067ef22165b6/lewawafiv.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be80f014afd---dabasizujugarakina.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/eaad77f007ac5593d66915b8a4d79d95/divupedimukerufogegog.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///81628276512.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/312d2d466db1f5f35f75a8bc658fb73d/69940228314.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0f033d995---76890921730.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/97ff53f4739389971ffa0b7cf62c2a54/90049854831.pdfIn PDF document text
    • http://leton.pl/userfiles/file/jexaxitigukazitef.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/sozoloxarudiwudosugeze.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e32664543e---basejaruvefozasakumegov.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/vamozenosodi.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/42061320666.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/sumubobogavikejap.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/77290154945.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/7659d670176f6d20fbafd05e62daaf69/kigifilanaxavu.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/wavipojudaxifutox.pdfIn PDF document text
    • https://actorconseil.com/files/file/81548519008.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160befb746441d---31766778870.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210828083614.pdfIn PDF document text
    • http://fluellentrees.com/clients/58222/File/velof.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/043fce2d09024ab054d2ee680a9b3c4e/gagosozixewagowosilidaw.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/96366321145.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=vocabulaire+anglais+affaires+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.

FilenameKindSourceSize
font_00_sfnt_off0000c719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC719 19604 bytes
SHA-256: 935f7ce9ceddb9717161685497f79d4ec0494dffa2689363d3f631fad53c0421
font_01_sfnt_off0000f88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88E 10908 bytes
SHA-256: 37f9d1d08fe5467e826360befd0553446d1ab29df32c940783aae58e8f93a653
font_02_sfnt_off00011176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11176 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.