Malicious PDF — malware analysis report

Static analysis result for SHA-256 168a32797062121a…

MALICIOUS

PDF

99.5 KB Created: 2021-07-24 02:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9ab047c84618473b30f76734a3607fdd SHA-1: a6ef83bef8407cbf0d4e2c4c95b9e4fd8c6976eb SHA-256: 168a32797062121a190af5d355b389c04528e19aa09c3fda67c9267b969b3b75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6ded5e5b9---xazirakesunalaz.pdf In PDF document text
    • https://clumba-indoor.ru/files/files/debipovejuvidulajusaxep.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b52272e7e2b---sizukuwego.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/f3955cb186ccdf1f2fee9d5e27df7c57/85846164499.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cd6964fc4---50188929103.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/domutezuvumasiridelafusej.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071922030780---41891298194.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/samulikemusezatevagofegub.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc4eab0959---bavovu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822e8376cf3---jawidesot.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/3672609312.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/j059ffr89ohnv21d4fm2ktb9u7/70481760613.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/46411077838.pdfIn PDF document text
    • http://minerva-collection.net/files/files/94040685552.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/1evla3545phfu65o426uhh2ft2/xuwas.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098362fbb12c---89015626884.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/lizogorowobir.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/711723441.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/temf775cer445glekoi4d8hi41/19040417419.pdfIn PDF document text
    • https://33mobility.net/uploads/files/13618232499.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/bm3ccsrs179co4db9g0e4ar7e2/80066719553.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/24375186260.pdfIn PDF document text
    • http://landia-print.com/pdir/file/torokezuwibuda.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/60142722216.pdfIn PDF document text
    • http://tai-group.com/upload/files/kaxogiga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=living+on+my+own+pdfPDF 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_off00012451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12451 16800 bytes
SHA-256: cea7b5f2e9bbdf3a48cf6bcfc32eb400679db74e44d3a87ea2ee80c0ea4a8ac4
font_01_sfnt_off00014fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC4 10360 bytes
SHA-256: 36717d60bce8fc4d3fbaaf2291a67278d020ca925cf61c8ee1cd131fd63f728d
font_02_sfnt_off000166e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1