Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec790dce850069a2…

MALICIOUS

PDF

78.8 KB Created: 2021-09-07 15:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e14264be8db3d2aa8882621961597944 SHA-1: b0ca40fd8007a36b697b5df08fe06c2c47379d4b SHA-256: ec790dce850069a298dc2d055ed3a52d25d8a9e7bc6e878f225aa60b8d2d26e8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious content. While no scripts were explicitly extracted, the PDF structure and URI heuristics point towards an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://archinfo.ru/uploads/file/putolavuwu.pdf In PDF document text
    • https://ahirealty.in/admin/userfiles/files/jaxek.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/31505149464.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3759514d8---norenavobupukibupixug.pdfPDF link annotation
    • https://aydin-elektrik.com/resimler/files/70561290936.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/000ddc7afd838e6b7cca0c13249a14dd/16180191421.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2lbdph5h0r2rjh52e2ukh6lpm0/gotakewiginusaji.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/ranovi.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999c597ca93---turasafumusijamutuzede.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c93979bd82a---73438277883.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/33b70e30273a73495451d414501d6daf/29250691437.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/83878654198.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/pifodafefabidu.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/40132882486.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/jizinofovawiwazizovowe.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/juwotekukar.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/48603270861118194b3af8.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec4b2bf112---wofivuwenoveg.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/06e74373bc2bb9bfe4bc80cc26828cff/34884934803.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d276828958---kuxalirud.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/kofumukutimamijegiba.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/23510220211.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/47605638153.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/513ujnkm9epo40n9j8fjf6o0l1/wadovolekevevulasizedipep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=geometry+books+free+download+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_off0000d2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A4 11036 bytes
SHA-256: be98949c0ffaecf7b245c05f8bb437c3002fdd9b21edf40eb0c059a184054927
font_01_sfnt_off0000ec42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC42 16064 bytes
SHA-256: ee79f9fc8d58358d21fc549676e6a9380d278cde4b4712f4b08b0af8aa91bc06
font_02_sfnt_off00011550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11550 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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