Malicious PDF — malware analysis report

Static analysis result for SHA-256 3424738fdd348ea6…

MALICIOUS

PDF

93.7 KB Created: 2021-07-19 01:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 8e505b0ca0e87a24edff9cbfc551f59d SHA-1: 6faee48a622a50362aa091529bd252297f045ef3 SHA-256: 3424738fdd348ea68242e1442195e0830eee4c5f5a1457f1f305d18ecf40d2b6
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall heuristic firings strongly indicate a phishing or malware distribution 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://softwarefactory.nl/images/file/xiruji.pdf In PDF document text
    • http://otoozevran.com/resimler/files/solaladotegewofojudaf.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/fetikadulavevifelaminob.pdfIn PDF document text
    • https://manenshop.com/upload/files/48637889785.pdfIn PDF document text
    • http://ladakhtripmaker.com/userfiles/files/19795495359.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c885d2da99b---supaxekedukizafotimuf.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/b4186burnh72r2ollac6ht78k5/fatewevuwinuxisu.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/90553577223.pdfIn PDF document text
    • http://daycamhoa.net/upload/UploadFiles/files/7048055663.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62f773b09b---55802135117.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/053fbd1256881f544e0ff7c44a02594e/doxagadezigomuluzagi.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/68341251931.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/94171841370.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/dosazovepa.pdfIn PDF document text
    • https://kueapem.com/contents//files/74780143601.pdfIn PDF document text
    • http://sport-way.ru/img/file/kofinadopeji.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/danuk.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607101099e758---balatodonefub.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/jabujuwanewason.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/82326218580.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160df4500466be---88681686434.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/gopitutakovuwefigi.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836ad416adb---xepalaju.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944c498f3b0---fugemogosapozetopex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=assassin%27s+creed+2+missionsPDF 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_off00010b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6D 17868 bytes
SHA-256: 30fef6352ed8bba098f6cc97abe8781dd8a82beb6fa9d646fb444f83d0fe2a87
font_01_sfnt_off00013a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A29 10520 bytes
SHA-256: 8ae4e4df05500bab633976b9948849a84a8145b5fb183dc95f466d304768fded
font_02_sfnt_off00015232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1