Malicious PDF — malware analysis report

Static analysis result for SHA-256 8132f2304a9c4687…

MALICIOUS

PDF

86.8 KB Created: 2021-09-07 04:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1b50e8c3a304b5140b540b9caeb416cb SHA-1: 09e56ea91e4923873bec5762951643f501b92ebc SHA-256: 8132f2304a9c46873350e053952b8e9522c5882a385e27a4c71c2acec368d396
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The sample also exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised or disposable hosting sites. These elements, combined with ClamAV detection and ML classification, strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://andlupa.com/userfiles/file/13324090938.pdf In PDF document text
    • https://mobiligennari.com/userfiles/file/wanoxo.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/fd3f99cc1351cde16113c54482a5931d/minudadepegu.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/pitid.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/54394661714.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/orng0h1f8ndanirobhl2rcf6ke/kewozajupawajomizexejov.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c2af72d3141---54002409381.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/gulepubuwe.pdfIn PDF document text
    • http://rejs2013.cycling-recycling.eu/imgturysta/files/lisewevapipowavebi.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/43429805293.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/85982012064.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/96105658213.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb49a3f983---gilitikijuforiwu.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/26307948240.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/bikowizatuwetowezaxedabo.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/97212973519.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/6bu5sn5g17pkmltrumepotg5o6/89863870270.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/9541434689.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/98950711433.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/walogovat.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609485ba55697---lakivefulafejujejap.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/faknmgn6dgabas69cpv0ch5cg0/damezanidunutezez.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/54569235814.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/viwemu.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/tiwun.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/natuwuxirixime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=introducere+in+nlp+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_off0000ec31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC31 18560 bytes
SHA-256: a0918b74bc52fca85ed37027f12babc3087ab3b61a13dec580a070432672400e
font_01_sfnt_off00011c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001344c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344C 10332 bytes
SHA-256: 516ae490563c3380fcabb63dad4e71ddbb1d67e740a8035eb3afca4dba88d1dc

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