Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a32556908e6a38…

MALICIOUS

PDF

79.6 KB Created: 2021-09-13 02:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1ecb04d98386505d24c13e3a46a920e6 SHA-1: 6e33ebb6a5b7d1efbe8c9eb9558d3ce64febe993 SHA-256: 80a32556908e6a386ab4bc5c51da1f1c8fe8d806a2e59066a8a0639fd171f0a3
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 0.9968

Heuristics 5

  • 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.
  • 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://119pump.net/d/files/xijuwezesetejitogovobix.pdf In PDF document text
    • http://tayles.com/uploaded/tisufovewofu.pdfIn PDF document text
    • http://st-communications.com/ckfinder/userfiles/files/6646059897.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/88155879009.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/59520425315.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/1695440585.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/71580935393.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/72169049490.pdfIn PDF document text
    • http://lobi.md/userfiles/file/95892131704.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/ruwupisitoworowulipew.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/midesefezemusanaxibuxilad.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613927a7855d8---53634821614.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/71178367023.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///33304274562.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/79684949848.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/95386434706.pdfIn PDF document text
    • https://maymac.info/userfiles/file/sewomuzimusisuribonaji.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/79524099578.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/99004374903.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/wugopum.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/21762769117.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/f55edcd6b00cb6cff0c0357b6739b428/disirabitum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=freelance+house+reviewsPDF 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_off0000d594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD594 10460 bytes
SHA-256: 80c717a0df7ceac8cdc9208a9eb9eed60357af8cf44a724f7abb66cd20ce2c7b
font_01_sfnt_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 16896 bytes
SHA-256: 8f64120ff01fd9fedb9ee903901a6cb9d23bab210242b4fe7e1564c6657d338c

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