Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe5bdb8d1a768d3…

MALICIOUS

PDF

82.6 KB Created: 2021-09-13 00:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: 72cab06204ac39563f9c73f8ea214854 SHA-1: 219646932fd335fbb262dc7f3a56e6ad441c33bc SHA-256: 8fe5bdb8d1a768d379ef3eeec29f7dc19739d9460a79e9bbcd09ff3144eb116f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://xanbiente.de/userfiles/file/82167975580.pdf In PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/99372037512.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/19de46b3066ee21265f547ffaca48477/kalofojomexutevux.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/4775339491.pdfIn PDF document text
    • http://beming.com/ressource/site-image/files/vafubepazol.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/96350140106.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/fokukuselalu.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guxupedipevajaz.pdfIn PDF document text
    • http://keacg.com/upload/files/jojunekorujafojijubinuju.pdfIn PDF document text
    • http://josquin-capella.de/download/gisosufiga.pdfIn PDF document text
    • http://gardens-spa.com/user_pict/file/pituvugadapuzifawikawa.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/31873359285.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/gewupipigevofubikexixoka.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/90296144419.pdfIn PDF document text
    • http://fruitvita.com/files/files/lugivutowi.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/dupiripiligizilemi.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/xutejukukepixobivote.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/52561721399.pdfIn PDF document text
    • http://bociany.sk/media/file/nigujijinepoxo.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/e01f98736fd908fdad522aefa2ba38b5/23459543675.pdfIn PDF document text
    • http://tipiland.net/upload/file/92909430974.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/39727990681.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/jirija.pdfIn PDF document text
    • https://km2804.com/ckupload/files/87071863737.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=text+to+speech+pro+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_off0000dfd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E8 10388 bytes
SHA-256: a56d88567b5e1693f9d913ad3d23e783777b33ae0e1eb1d66a9d2b4b5308a775
font_02_sfnt_off00010faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAF 17556 bytes
SHA-256: 9ea343e80920b175f0e035ebca4c495b5a20f32ebf51b63540bde7ec3add347e

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