Malicious PDF — malware analysis report

Static analysis result for SHA-256 b782194ad192e4f9…

MALICIOUS

PDF

77.7 KB Created: 2021-09-17 00:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e85a350c96963703fc551254cdc081c SHA-1: f9069704b747eae15e00c4bcd82abeefd7d17200 SHA-256: b782194ad192e4f92b266a3b1c72383a13b6c3442d2ffa175244f6d19276aadc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and link farm indicators suggests an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=palasa+full+movie+in+telugu+movierulz PDF link annotation
    • http://appartenvue.net/appart/upload/images/jovoxujutoselokufek.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/piraporolimepi.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/fitarifarunigofi.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/30786944315.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/26526881188.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/19525603734.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/xolelojejuxuwasew.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/luxowibajig.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb59321bed---57729766865.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/danirotowebasovi.pdfIn PDF document text
    • http://amandamaitland.com/images/file/79522374206.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/wabipor.pdfIn PDF document text
    • https://bursac.net/userfiles/file/12347365237.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/e69e630afba2a35cd5ab4ec92c67d326/33152613319.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109081054046522.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16143b1656ea80---36900523264.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/cee7689ae51583cbcd6baa65d9ddbe5d/78800107478.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/90531235153.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/79575588539.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/98321859933.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/rulakobax.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/7594300235.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/4212072675.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/13411989784.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/xowasotu.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_off0000cbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD0 10784 bytes
SHA-256: 2fa0d11f3bfafe3bdbd2e3b3cd7941a0e893dae4643dccf663a9ee6eb0f95e44
font_01_sfnt_off0000e4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C2 17096 bytes
SHA-256: b4df17be8cfbcf15c980dbb9d328fd9e5103f7024abcfeddd6d705c0f693feaf
font_02_sfnt_off00011093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11093 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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