Malicious PDF — malware analysis report

Static analysis result for SHA-256 649771a38d05e8d6…

MALICIOUS

PDF

86.4 KB Created: 2021-09-13 08:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d53a902563d3fe7393b3cd32ebf8de17 SHA-1: a60cbfaa4a08d813d91f8e92988bc4b625986ffd SHA-256: 649771a38d05e8d673bd84d7094d607e524cf25c1878239bdeab33e3357727c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate an attempt to distribute malware or conduct phishing attacks.

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
  • 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 https://crysiq.ru/uplcv?utm_term=new+bollywood+movie+download+by+filmywap PDF link annotation
    • http://umrllc.com/userfiles/files/16369805133.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/90738583957.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/pukoxegakulo.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131b920690d1---mivagimevaxorisusupulibe.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/sigobudi.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613180de2cc39---65897530194.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/xuwefe.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/5597794478.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/78672938600.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/25843454260.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/sabajivejuda.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/48021958693.pdfIn PDF document text
    • http://ingore.cn/upload/files/mepavadide.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vinanotok.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/14588812754.pdfIn PDF document text
    • http://ros-audit.com/i/up/file/ledojopatalo.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/396811f66336bd2e167c42a9ab23e583/69849630624.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/soduf.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/14859839434.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/20800613910.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/ninoxurexegezukime.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139dc525c4d6---nevuf.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/xojazubevuraborowiza.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/14632927299.pdfIn PDF document text
    • 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_off0000ea7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10295 10676 bytes
SHA-256: 64e8c54806a88a85e007d246de256e993080627dc7c27b53849c38d52a0e6d69
font_02_sfnt_off00011acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACF 18688 bytes
SHA-256: b9312896caa45a596ed9865e5af72422b9b32db6ed36401facabf1cad48067de

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