Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26a99d7da23d5f7…

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 04:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d20dc78c06b4b96af099ea2d277c1198 SHA-1: 9450c64038c64c1c9293e7a644b4bb103f4e9e64 SHA-256: d26a99d7da23d5f7a74ea349976e509b3b72a38a4ccf1289e4ab8d4dbb0ffa49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/c1cbb50c21aeec1c45f5e00652613472/64760141671.pdf In PDF document text
    • http://rayhovietnam.vn/upload/files/pudimemaz.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/66457091208.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/pizuxemetaxen.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/41348445427.pdfIn PDF document text
    • http://sgrdinstitutionspandher.org/sgrd/userfiles/file/2153001311.pdfIn PDF document text
    • http://methese.com/upload/files/zukuzemavowusovawesex.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/28435771375.pdfIn PDF document text
    • https://scapetime.net/images/website/user/files/famelanez.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/55168622430.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/97962929209.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/gajiwar.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/37813905259.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/gorupuruzaxeduzajanow.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/65142548751.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afca178bee---xiwov.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/60d6dd80da606c14068d1f67441b7a04/23599276179.pdfIn PDF document text
    • http://educationexplosion.com/clients/a/aa/aae59ec6301d25964842a0067e0ae100/File/243574717.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/e5p301se7o5mla6okmkcj8l1eq/97470379792.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/lasawutudidisab.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/kbprrpc12rt325jnt2cato6r66/nolirupipunufiwuxijejo.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/kesutivawumipipuwonof.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/4cdce188e9a42d831228a0fbd7bc14cc/jisoguvive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=brian+doyle+joyas+voladoras+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_off0000e7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C4 17100 bytes
SHA-256: 3f4fea1a3fafc20f1b18a9910b2bd5552ffef7180087a8c67fb25d163c7f8033
font_01_sfnt_off0001138a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138A 10756 bytes
SHA-256: 07a13310057162e992515414468ebf11ddc266e58828aa049312f1bfbd582a1c
font_02_sfnt_off00012c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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