Malicious PDF — malware analysis report

Static analysis result for SHA-256 be48a83c0b7c2eb5…

MALICIOUS

PDF

98.3 KB Created: 2021-08-11 00:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e65134b6d13c24e5026bff2ba5bb2cd3 SHA-1: 56fc30dbabb743233d81fa24d0970661b3d29e99 SHA-256: be48a83c0b7c2eb5b80b046afb6fa6ebd94c238a37a81046a4f013cb915af29a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites hosting other PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a scam, as suggested by the 'SE_CALLBACK_LURE' heuristic. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/161012d5d22bfe---lebafi.pdf In PDF document text
    • http://myphamlulanjina.com/upload/files/19359428289.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/mafotapulorusezuf.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9205755185---pipikokoxiwor.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/62462371740.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/didatilutabezupetuwojigaf.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/rawafuput.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/2c037748ee482528837799879c005223/82127765914.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160848342d5e04---goxezapepimajat.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2f0704dcc---33740556984.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f0cf1b4e4---81223446376.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ed9a44eed964be5b0d73fbe502411ee8/62440718934.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/64792515402.pdfIn PDF document text
    • http://advicetao.eu/pictures/file/27343284421.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/f15abcc8d4f0fa9331102d3538aec01b/xasidigaxutidamal.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/wusenebebasozikinurutubav.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/lozowepukejemejikuwafeje.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7aaf6b76ccfc08d835d2750360af462c/bazururapileduvegemulumi.pdfIn PDF document text
    • https://airbays.com/userfiles/file/muvobenevedoweridotokel.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cb918e051dd---lawutemosorimelup.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/rebavamanafixuwas.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/bofekelakuteluvulipo.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a970d46b263---puxir.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/vonedovesotaxufutotilok.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b958ca077e3---zirufexorim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=wichita+falls+texas+jail+recordsPDF 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_off00011bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFA 17500 bytes
SHA-256: 8784035bdc14be13a5e2843512922bcf0c7ec47111bfd6f9b44c95d1fdc459dc
font_01_sfnt_off0001493a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1493A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16151 10692 bytes
SHA-256: be6a312d41347abef017eb2a5d31da2d5a2a69dfb20e6a4cad490bec4c901494

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