Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2f03f89f4e1546…

MALICIOUS

PDF

76.0 KB Created: 2021-10-01 02:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 48c354be2624e9a7aca25620e7c90f7a SHA-1: b24e2a5cd17e6793adf6965d3444c50f57db08df SHA-256: be2f03f89f4e1546a22b061e7aee6a44310d8bfbed40ef0c51dd3cc327d5b554
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://huntic.ru/uplcv?utm_term=rene+descartes+psychology PDF link annotation
    • http://aylabawadi.ae/userfiles/file/95617641285.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-9/20210909000046536041.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/52272224765.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/82503208121.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/nivapesojixevejomadij.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/bejaredoxige.pdfIn PDF document text
    • https://kmedebiyatgunleri.com/ckfinder/userfiles/files/46526486750.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/71845736596.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/lamizamu.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/54309461583.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/42929082441.pdfIn PDF document text
    • https://garmin10.ddbseven.cl/userfiles/file/67282787510.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2593eb3e3e4fcd73702b8683f6eac4b2/xirewemij.pdfIn PDF document text
    • https://zagi.hr/files/24124077358.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d6f2718ddcf6e20cee92c2650f1c4a78/29539095415.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/korifoxezugarotelizanumi.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/69473762759.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/lukoloj.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/43259794718.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/77830766744.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddd196c9ec---sapul.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/sivudon.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/6474014671.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/90189228254.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135863b9f5bb---kowarusemudepafudiwajiwa.pdfIn PDF document text
    • 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_off0000be0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0A 19532 bytes
SHA-256: e36939fe76a2a5a8e3691835521e60c327153ba931008713f0b533a59b5ff572
font_01_sfnt_off0000f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12D 10860 bytes
SHA-256: 0ad04092399fad46ecf7a92b460c9e59ef0b23f78617e8b299775e3e1fe4ec8a
font_02_sfnt_off00010a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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