Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6d6d5b5ef42ae8…

MALICIOUS

PDF

94.9 KB Created: 2021-09-06 02:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 907b2d5fc3e41737f7dad529840f9ab9 SHA-1: 7b508e1ea65a3e213e44c49521d927d91d577a22 SHA-256: 0d6d6d5b5ef42ae8d1d192798451d59a0f81b54aec1f879f33e26a26e77f4d9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external websites hosted on potentially compromised or disposable domains. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a43c04337a1---nenarusizogezer.pdf In PDF document text
    • https://tavio.ru/files/file/jozusasozomogexepad.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/dufesajupezotemudijojukan.pdfIn PDF document text
    • https://mimpisiluman.com/contents//files/ralulin.pdfIn PDF document text
    • http://szwygs.com/upload/59352288236.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/doruruworiwitozapezus.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/470228c88bc549ed22e287d51dd3aff0/1472357948.pdfIn PDF document text
    • http://bienbao.net/uploads/files/bemafafedenokupajiz.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/25143212163.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/raxum.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/12062644680.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/5c1d4eeeb0bbb962dfb36b95284e01c8/35259816955.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/zojaj.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc66abe4c1---66968694837.pdfIn PDF document text
    • https://tcremich.lu/files/files/51292308367.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/24644060390.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609d469568d12---firanatixeluzabak.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aad6a129be8---28629150664.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/zonozenejenageropixir.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/0ed082a721da4aa0563fe84dbd30dd9c/xosevotolijumajubina.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/8557227027.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///63565762756.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb16737f735---80325513268.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/demajilepimusitoje.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607741720544c---43958815360.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=give+and+take+adam+m+grant+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_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 18976 bytes
SHA-256: b71ec83968a2d13352ccf3fd7548ea40cfe8d98f2544ac53270c043ff6377f04
font_01_sfnt_off00013b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B57 10704 bytes
SHA-256: af0e4e27bbe30bfeb4900dc679d6e2a70eb58ad19b8cd9ec7fdf3a827916f1fc
font_02_sfnt_off000153b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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