Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45b3f02e4840b4e…

MALICIOUS

PDF

102.4 KB Created: 2021-07-28 06:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 848c1a3bedec8415ee25d2b3fd908df7 SHA-1: 84b20122fbd1d9f77abfb42b22038bcc0f147443 SHA-256: c45b3f02e4840b4ea9a57b1f6e02b2c9ab7c5156b5ded0f4faf2e46de8878bc9
164 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external PDF files hosted on compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/58859566bbd86fc978083800dc39908a/pulorabipugikexaritew.pdf In PDF document text
    • http://npi-management.org/ressource/site-image/files/gijesivezogidikoteba.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/97516700947.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/27041319120.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/85011578252.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/dibitoko.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0e5f0c9b2---wutunosinowol.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/samodeviji.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a64adc8339---2314603960.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/xefixufudutiwiniponiteda.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/nebarezoxar.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/pqlgg350ptdbije2jejh0a4lkq/35697851274.pdfIn PDF document text
    • https://aathichudi.org/userfiles/file/meredodus.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/mmcoqet1ghrqv45is9t1m0q6j6/83785744227.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/94323505179.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/160748926130a5---wuzukagesidizajew.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/gaxodabowe.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/k3r10pap5ijfuttse969f0o300/wasexame.pdfIn PDF document text
    • https://htddienstverlening.nl/userfiles/file/53046957739.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/0401bf640a8671ace410ccc151810666/zibawajibewepopuduken.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b486e712035---38820736325.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/bh80geti66qk6lld10tfdtldjf/21073229293.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=outlook+web+app+login+navyPDF 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_off00012a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001427b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1427B 18456 bytes
SHA-256: d35ec7005d0c62b7713a3b6adc46a00c05d966dda8c5ce0e8fe585362f5fd6b2
font_02_sfnt_off000172b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172B3 10784 bytes
SHA-256: 8529368d6525061c8bda8fcd556513b19e9443a8fde04a2b901a49909af84b12

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