Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7dea8deedbc87a…

MALICIOUS

PDF

72.8 KB Created: 2021-05-13 10:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 163cd432d7ed2226a13877c56949b20f SHA-1: bc3c561076689ed0dac473a234de5a687821a4f2 SHA-256: 9b7dea8deedbc87a50d766227d7e4ad9aa1a35f57b72a6b42d59526ff17f3661
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites hosting PDF files. The embedded content, though heavily obfuscated, suggests a lure related to 'Salmon fishing reports Ireland', likely a pretext to direct users to these malicious links. The primary goal appears to be redirecting users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609568e44026c---gawazavudafesi.pdf In PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbc1f36424---20353575111.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/6a3679ea9fdd209ef169d84eb5488058/64772133618.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/81809192497.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607d01c942173---48905288669.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/31682067915.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/75985741711.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/48kqqqt4q47lomh47vfi0lit61/bizabuda.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad439e9c47---37476948502.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/639de107ec4c618be820659f21302e23/fuxudifulujusa.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082b9d6f091b---67406737725.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfbf6a9c9---wivetesonowewurewobe.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989cbf4f309---57564228449.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/56b6b5854da00b0067f4836e3e59408e/82204970770.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/1oec3dfo1nlnjp5m0h2r2oiit5/potixubepeduwaxilot.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160717edb6cf8d---getonarewaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=salmon+fishing+reports+irelandPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44A 5348 bytes
SHA-256: e90837fa75c539b3efd16598dc3655905a12a00b5c101e704088a0c3dd74a5d3
font_01_sfnt_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 9956 bytes
SHA-256: 8213e3bde82dc751a8cf297053049f4abb2fa2a01ed649c59c67bd877984d8d0
font_02_sfnt_off0001083c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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