Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf3260f573ae3ba…

MALICIOUS

PDF

93.3 KB Created: 2021-07-31 11:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a621a9150685d3a28283ffe700b0667f SHA-1: 3fb91ebc3f1a6028def7194349d0ad93a131dd84 SHA-256: fcf3260f573ae3bac5fb7ab81ba92e138af46cdce600bfa14afc9afef09b2167
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, directing users to numerous unknown URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The file's structure and embedded URLs suggest it's designed to lure users to external, potentially compromised, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/37233510561.pdf In PDF document text
    • https://rasathantrananotech.com/ckfinder/userfiles/files/9120789784.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/75160692803.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210619171300.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/bogevegevaraxarej.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/24812855238.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/51285379330842a4f33aa2ef5a5553b7/23214244726.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/tujusewetekagimisejuv.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/79945019141.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c484701333b---gowaviduwutu.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f08637cc8be---98772852051.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/59728664368.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbcf18974f3---2083619617.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d4057540656---kezolagozonabut.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7d3323d4b---juzuzoz.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/82623560127.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/6d5dkuuf2q2gmh2287c09q87gf/kezowalutajejume.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/o8b0mhij15j4lc18g69ne7grs8/jimakevunomigiwamiwuj.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0b9ccad07c074ac23ca826c5548c4602/82923523802.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/9b3a1e40346dc9bd75775a26f07be243/92732624292.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/tarireveta.pdfIn PDF document text
    • https://akvaguru.hu/user/file/92092247286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=is+the+chevy+4.3+v6+a+good+motorPDF 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_off0001067c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067C 17412 bytes
SHA-256: c5e4d1b4b120613970daa11705ff8a72eef1c26b79e9ad21eac18d6397093cbf
font_01_sfnt_off00013471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13471 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C88 11192 bytes
SHA-256: eb740027f8f57ab74ed73e9e9088797be6b36ea4e2b65556c6916ad5930561c1

Open this report in the interactive analyzer, or submit your own file for analysis.