Malicious PDF — malware analysis report

Static analysis result for SHA-256 f070cccd9ff937d7…

MALICIOUS

PDF

82.0 KB Created: 2021-08-23 15:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9ab08b8da9f5c1c19797e6726896c0da SHA-1: dfa601e4e31374e83febbc42131b5b196a66b010 SHA-256: f070cccd9ff937d72e2fbbd1eeeb981a2c12a2e8690541ed6c71faa5682df119
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS upload directories, suggesting it's designed to lure users to potentially harmful content. The presence of numerous unknown URLs, some hosted on disposable domains, further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17a6c2a115---98552334117.pdf In PDF document text
    • https://strongpointmarketing.net/userfiles/file/11476576047.pdfIn PDF document text
    • https://aashianarealty.com/file/lenasipeboxakuwogodopagu.pdfIn PDF document text
    • https://wecareprogram.org/images/file/79472476023.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/mikobumoror.pdfIn PDF document text
    • https://datawire.gr/files/files/49327613048.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1a917e6c2---12448374970.pdfIn PDF document text
    • http://quaint-house.com/19069844493.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/10160101862.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acbe12fa5e---wotujaperonasen.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/9e9a492d267a36e9c371a8ce1b13c5b9/rimadelevikajuzibamorim.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e009bb3253---25835483365.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/1331740664.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/rogekenejorajo.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1aa07d85e---99139345664.pdfIn PDF document text
    • http://chieucoingason.vn/files/siwafakidifitofurus.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/26282689031.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed0c7b46b7---84846405871.pdfIn PDF document text
    • http://noahsmarinesurveyors.ca/userfiles/file/tolot.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/kowezupopise.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/zumosoxesasuzurekobe.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87e00dd55e---tixalosudivodusanivuvap.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/14513389130.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+tie+blouse+knotPDF 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_off0000da83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA83 17892 bytes
SHA-256: 62b6376ac244a93805931b38034e7a371121a4c0d4dc94f1a6f82f7abbb5566f
font_01_sfnt_off000109fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12214 10248 bytes
SHA-256: e4540d947c9077b92cbcf0fd4c06c3cd60cb6e245ead1f04af98f37d40475c2f

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