Malicious PDF — malware analysis report

Static analysis result for SHA-256 e199de245e7682c7…

MALICIOUS

PDF

119.8 KB Created: 2021-06-30 06:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c5e4bff760fd3600c56e730c3559c00 SHA-1: 3a429622a5152fe69662c73a65301feec5cadfbe SHA-256: e199de245e7682c79449b60af9403a1fbe6b7c2437fdae47727ecd67f3f8a30d
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. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous links to potentially malicious content suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://yishiweb.com/upfiles/files/20210609_055051.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/cpgllmerhrse3hpgchtn9ec638/bobekajutetafurujutatejo.pdf
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1e53b618a---kiwevejor.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/4f25g5oagcc2vgnt8o2upcg5e7/gosarufagetokogotalugifur.pdf
    • http://alarcon-v.com/editor_upload_image/file/79103228612.pdf
    • http://3bbb.fr/ckeditor/upload/files/88216533322.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160dbce663827d---78633943297.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607104042ab7e---rimibedakuwirobotufid.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160943fbbdad36---widonidixudezojifozelaw.pdf
    • https://agentcctv.com/userfiles/file/nifiketi.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/krbv2onl00nju6cd3j2gdnsnk0/50692551870.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16083f19027d74---44336024991.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/264e8f8dc16e60a7bf411a4dbaf39c86/wonikifagi.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/25ae236336acd5f1f846342ecf406aa2/76889438483.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c3120687a---zorotigazonexesugi.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081eaf5492df---zevotegiganejekiwavoj.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0ecda61c7---10304660430.pdf
    • http://toyteepee.com/uploadfiles/file/210520165425811515od0pgd.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c3a9db193421be6109069a912fbff765/jipegofulebivodurawojenop.pdf
    • https://bahceneryaman.net/public/content-images/files/xewugalofutepove.pdf
    • http://photo-preiss.com/upload_files/files/farudedafinulawerefolaj.pdf
    • http://www.hydro-tg.pro/upload/file/49980689721.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/309fa4089b00cce8f24eb34593b15058/xusav.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da49451e27---27103569711.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=my+family+research
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000175f2.bin
3e6a816ec4789c9fc761f74a7b6c12868bce69c15c551a7f4d38e14d4e7aae04
pdf-font-stream PDF embedded font (sfnt) at offset 0x175F2 17016 bytes
font_01_sfnt_off0001a276.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A276 16792 bytes
font_02_sfnt_off0001ba8d.bin
f3bf278148299ca4a8f7b88cbd3a080cfbe92ac04ada21acc0ff1223cd34bc92
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA8D 10388 bytes