Malicious PDF — malware analysis report

Static analysis result for SHA-256 111e66392f34788c…

MALICIOUS

PDF

70.6 KB Created: 2021-09-26 15:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 607f9ae7a8807667ce994a610d9c1ef3 SHA-1: fdd4d8fa54bbc46a020f16fdeb8d66db9c4748c6 SHA-256: 111e66392f34788c4e8a10c708f42f7292ad1efc0e9c355a96b3be71b566fa49
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate an attempt to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://queure.ru/uplcv?utm_term=breaking+through+book+pdf PDF link annotation
    • http://autolavaggiocraparotta.it/userfiles/files/12336770524.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/dulipesazilopivuvazipamab.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/27584942506.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/27707535955.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/gulavegujukivudalosumapa.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b28652e93c---41720035039.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/40549573892.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/0sf0l83mdou08m8qr72ffk64r5/magugufubifudidamerev.pdfIn PDF document text
    • http://llux.vn/uploads/files/82234804515.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/furipozofavawosesiw.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/26106499933.pdfIn PDF document text
    • http://sun-eko.eu/files/file/6070325282.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021090421551063.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/xavimalevelonaz.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/85596593675.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12306491607.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/fupifolefinexoridirak.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/niwudajogupetuw.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/soboxepezubiladiwo.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/rikisujemaderenakudubef.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16134e47c1b37f---xipukirugizanixinaxifajis.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/bamakofebozaxora.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/ratijefite.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/zilitulamupatu.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_off0000b361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB361 10948 bytes
SHA-256: a94fdf064269c9c9b7ce2f9ade058f300cd3b4755f3aebfa8752dbfa52a5fb06
font_01_sfnt_off0000cc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 16032 bytes
SHA-256: 9b6e583120d6e22b967c5a77f46df94bb12ebaf3f8ecd90abc3ae39e8ec16255

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