Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e412de4cea8737e…

MALICIOUS

PDF

85.2 KB Created: 2021-09-13 23:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c5a15fc27b45fe69a6592a52f7159d55 SHA-1: a231298d54d6660a32c037213cdbabadbececbde SHA-256: 7e412de4cea8737ed08e0bd6adb9e44bce4eb56e4f01dcf5a06cb6a9a2c91b15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the link farm and the presence of external URIs suggest potential for JavaScript execution or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://equalitas.es/userfiles/file/jugoxoxavekaramagutiga.pdf In PDF document text
    • https://rmduncanrealty.com/userfiles/files/81528044030.pdfIn PDF document text
    • http://innotack.com/userfiles/file/9311335992.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/14070960045.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/79029895753.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f7a456d9a---momotagixatakujaziferuliv.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136da4e5ed7d---xipokag.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/94678874823.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/67986178823.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3d8ed87fb---gowitujizeme.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/d8cc2q6krlom7i26mkipdvo2um/wetetijasogitisitiz.pdfIn PDF document text
    • https://notarbrazda.cz/userfiles/file/In PDF document text
    • https://alamansyria.com/userfiles/file/janojepirov.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/36351386198.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/3196422007.pdfIn PDF document text
    • http://espokebar.com/uploads/files/1017775894.pdfIn PDF document text
    • http://rent-lease-no1.com/userfiles/file/20210913043828.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/72565441298.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/rasedanozivozasomipojus.pdfIn PDF document text
    • http://train-in-japan.com/images/blog/file/86731939397.pdfIn PDF document text
    • http://jd6618.com/jd6618/file/2021-9/file/LwpCms2021_09_03_13_33_08_1794.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/91552049231.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f811ea72a0---jimotudalijumogelen.pdfIn PDF document text
    • http://supragyn.cz/userfiles/file/41654370685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=pixel+car+racer+underground+apkPDF 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_off0000e6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B1 10716 bytes
SHA-256: ea75ce9f1519aa3f4a1409498dba305da1ca46c8a24e5e8ac74cdb4733ee5991
font_01_sfnt_off0000ff25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF25 18308 bytes
SHA-256: 9d83870dfd2632874d771d1ed4c2e66437086f4a3aec05d3474cb290c12a3cf6
font_02_sfnt_off00012efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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