Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c13a03f26095cf…

MALICIOUS

PDF

83.1 KB Created: 2021-08-05 23:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 43b0eae8e6557122516d32d8674408cd SHA-1: 2edb6c8e19bcbd266eadf833edf65aa5620cefa9 SHA-256: e9c13a03f26095cf1ae00738892b5cbbc3d08a19e87f80ed864998a7ab720d83
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. No scripts were extracted, but the presence of external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://envomask.com/wp-content/plugins/super-forms/uploads/php/files/5a763a0e19564705df62a98943ab2f1d/27426970317.pdf In PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a87a794c68---9081967286.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608369d8b389e---rexotisojeroxe.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/7050e2575a2ee869ce3781a3407bed39/23587478173.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/29588424585.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/xokefonaradoxirofiv.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c379ab86d45---peleresutogujex.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcffc84823---zatofatu.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/r9tb02cqa2hc4gcjg59l3d9d53/43778366067.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1abec6c02e---xigiveziminosakezu.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/40459312273.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/gelonebilen.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/xilamifubafasejuzi.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/ranavoniduzogotuzak.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/vajajabanuxirin.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef9b13d62a---43678537448.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/fedunapofanebajusegulizi.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/df6d41a943034786fb9b27f9d9a79a48/58874868806.pdfIn PDF document text
    • http://lecieldesandes.fr/ckfinder/userfiles/files/51501707940.pdfIn PDF document text
    • https://songhong.info/userfiles/file/tabumevazuzuvapodom.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/juzegexupakesa.pdfIn PDF document text
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/29319767315.pdfIn PDF document text
    • http://sammyurias.com/userfiles/files/66354404943.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/nukimudidobevonux.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16077cfa4741eb---43713707986.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca6a960752---50542785122.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=define+prime+implicants+and+essential+prime+implicantsPDF 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_off0000e063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE063 16812 bytes
SHA-256: a6c431a1912b63c7be863d9b11d42735e05f0390f4a73e7934fca9beeefc0708
font_01_sfnt_off00010c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12469 10664 bytes
SHA-256: 969d3b9eff4862a4f4cd86f15339b8658d2a930325f0a2e3e73dc29f27b27e85

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