Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a38cbf5a4af34e…

MALICIOUS

PDF

75.2 KB Created: 2021-09-07 04:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1525359b4bbf127d332a4450f0800fcc SHA-1: 255b11c920ddfa4f49c0e49b328695ad25127ba4 SHA-256: 97a38cbf5a4af34ed231cf77a1ae71a0ab1ed5637b24a2ec4801c0e8d73193d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://ludifrance.fr/userfiles/file/dewirifiruzu.pdf In PDF document text
    • http://akicgiyim.com/userfiles/file/77074881756.pdfIn PDF document text
    • https://t2sc.me/userfiles/vudajizelamiko.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/26707501487.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608564cf6883f---19774214795.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021070715555773499.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/t8o8o7an5apajuano7k8dr02id/69830416400.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/80595320804.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/xutomak.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/zafexuwotod.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/39c0f9915db03ce4f35db0d22b21fdce/78484889039.pdfIn PDF document text
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/82603750691.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08c5813c75---rofujivujagejeropakigu.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/62776620721.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/74267031634.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/47co8r0mu4rossgch2tns7ngt4/levitaziwedagedodasin.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b1ff5d945---dupijov.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/8511016495.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/466fd8be063feb546de79f1075df0c19/94923852338.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/5b87f82cf3c5451a31a8a946f6c22c98/56750080187.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/61b3d428eb95d63d8f06d0bb68dbae25/88948072624.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/c2b337fd1eb514c11cda881683748b30/kexojuvekoxotekagug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=basics+of+digital+filters+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_off0000be90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE90 18980 bytes
SHA-256: fa15b55f0eab16dd073f339ed0c35a00b85aead553014ef0ad9ab6ead38ff52b
font_01_sfnt_off0000eeeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 10744 bytes
SHA-256: 94ba149b7c67dcca8fc900d17c818ea4a0e780439e5fbc099dc0871a429906dc
font_02_sfnt_off00010794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10794 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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