Malicious PDF — malware analysis report

Static analysis result for SHA-256 620194cd65cc1c55…

MALICIOUS

PDF

80.2 KB Created: 2021-09-11 19:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a1adff39fe037ec2fbbae5c8070fb643 SHA-1: 53c232f4f0147d0748b67d4bae66082cf0bab697 SHA-256: 620194cd65cc1c55d42b198abca2609c535eae2981fc34d72c009a23905073e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It functions as a link farm, directing users to multiple compromised websites, including one hosted on WordPress and others on disposable domains. The embedded URLs suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://infrive.ru/uplcv?utm_term=hardcore+henry+full+movie+online PDF link annotation
    • http://zonweringbelgie.com/ckfinder/userfiles/files/13013977903.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/bisegexorepavefoxukiwopoz.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/befakigo.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/torejiremuwediku.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/97691080558.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/89d4f2adb55a5415cccb639d928acb9a/61716604785.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c48e95bc8---89231784012.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/83872678570.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/rafoxadixewetorovabu.pdfIn PDF document text
    • http://ipllaser.in/uploads/94022338254.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/67366846935.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/sitilowosi.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/81463785107.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/ziroxakazuzubo.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/vomeloxupi.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/zotozelilaguvuvi.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c74fca3574---99284631137.pdfIn PDF document text
    • https://ecoquimica.cl/dinamicos/uploads/file/larerigotax.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/96058470191.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/27642087266.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/8488378336.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/barazuke.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210901_195224_154.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109010055178805.pdfIn PDF document text
    • http://autolubitel-irk.ru/userfiles/file/vurajevowaverowunafalob.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/19752685996.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_off0000d6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B3 10748 bytes
SHA-256: f6f9ed68c2d1db093b50922df6a5524b87afbf64cec6aec7ad6fd82734b56ef3
font_01_sfnt_off0000ef1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 17224 bytes
SHA-256: e989ec3e106544fc0e0a51bf07d8c3de6becf909483959f0188618f0e65cd91f
font_02_sfnt_off00011b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1