Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad29d6498718884…

MALICIOUS

PDF

82.9 KB Created: 2021-09-23 03:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a40a3a3f34a6b68245c2a93b10f772ff SHA-1: d657c210e9895ba020af66397abae88c1e1c1e74 SHA-256: aad29d6498718884cdd5657435ff1a947ae40f82c163cd5922a032be23f7e0ef
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to PDF files, and is flagged as a link farm on disposable hosting. The embedded JavaScript stream and ML classifier strongly indicate malicious intent, likely to facilitate the download of further malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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 https://aljuboori.com/userfiles/files/52959172393.pdf In PDF document text
    • http://fizjoactiv.eu/Upload/file/ferukija.pdfIn PDF document text
    • https://ladymamashop.com/uploads/files/202109151649284439.pdfIn PDF document text
    • http://hansungidschool.com/userfiles/file/84535798726.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/3862842795.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/pevefu.pdfIn PDF document text
    • http://audiohrestomatiya.ru/content/file/soxopafoperadus.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142256b91533---gilasog.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/75629130530.pdfIn PDF document text
    • http://zzquansu.cn/d/files/gulatefagozizabas.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/26733822744.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/94633595893.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/e38d66de484aed40c30772977f35e42a/69994028446.pdfIn PDF document text
    • https://shreegroupco.com/userfiles/file/daloriwidezu.pdfIn PDF document text
    • http://efcosmetic.com/uploadfile/files/94298647695.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/pimetujexov.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/ximajesogulavijibexiv.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/81167443088.pdfIn PDF document text
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/nituku.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/pumudupedozuxosapi.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/93598597528.pdfIn PDF document text
    • http://arucax.am/user_images/file/duxufawoxulewosigelivusa.pdfIn PDF document text
    • http://soupworld.de/upload/file/77802058961.pdfIn PDF document text
    • https://il-gusto.com/images/file/70783964156.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=ps3+games+download+for+android+apkPDF 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_off0000dbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB7 11092 bytes
SHA-256: c54526b87be989c236ca8b7324f0ee0cf080044bb3ca33c11eaf4c5e46f4743e
font_01_sfnt_off0000f56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7C 18608 bytes
SHA-256: 804cf740f38ab5cf98d5b86d9a0dedf18ecd2b64ea763e8b96c013bd9dce6287

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