Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe14c8e29ea43b5…

MALICIOUS

PDF

74.9 KB Created: 2021-09-05 20:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cc137026c0b31ecb41ce5fc53afaddc9 SHA-1: 5a6e0774b6e0ec010cb50326754836ef538a69df SHA-256: ffe14c8e29ea43b5acbe463d48d1f05e33995909cf2f7f04688666544f1b660f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The presence of numerous links, including those with 'utm_term' parameters suggesting search engine optimization tactics, points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/34aebc2b08eab9d9da7bdf15deee5afb/80590816129.pdf In PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/vebunamuturotibi.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/38902953284.pdfIn PDF document text
    • http://ks-system.co.uk/ckfinder/userfiles/files/jepanalikexokibilun.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/vananubabu.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a286f02e98b---97371732344.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/39651108695.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/jivoresor.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/83933243447.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16095f503cb16d---97686031970.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/sikadiloluk.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/82898793076.pdfIn PDF document text
    • http://land89.com/ckupload/files/gozumoxiwebowipagopoxom.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/78547e5177dc36cf2e923c0037dd3b72/41118647886.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/siguximetafa.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/17983965573.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/73544748605.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/qogaamgcr4r5k0vard1ckdmhts/40607559304.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/62384205434.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/dekemamesos.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/98386218684.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7ac824b12---gapapo.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/25297483317.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=jahangirnagar+university+admission+test+question+bank+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_off0000b9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9FF 11548 bytes
SHA-256: 528ef72bcc9ee8758a5bc234d5b52d549453a1e81ce54a2803ba54672c8921f0
font_01_sfnt_off0000d48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 18756 bytes
SHA-256: 54a157f69e2111f6162e55b4b378dce5279f425c34f0d511cc6774c70b199906

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