Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc3c97a5fbd7a03…

MALICIOUS

PDF

83.4 KB Created: 2021-10-13 15:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d9c5326c17cb282a284c3ced5b7ce655 SHA-1: 75f4ac5c81c9e7ee90527511f49086dcfa5265f0 SHA-256: 9fc3c97a5fbd7a03b2fc4ffdc6e028fe2928b3a4f6a5aeecaade090bf65e8aa2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which are hosted on potentially compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://www.facyt.com.ar/ckfinder/userfiles/files/59151370678.pdf In PDF document text
    • http://bright-inter.com/file_media/file_image/file/31394541765.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/figajukaduferijavar.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/37624030285.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/voreliperijuxodovedu.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/74283306238.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/57343620595.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161503b155dc9a---50608404651.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/3792507165.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/jeliguk.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/lenoxud.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/2021920753121071.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e10b0b8699---mipujoxijivepaserinugape.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/adaf84aa6203300adfc16010a41f40d0/43362295427.pdfIn PDF document text
    • http://dhalahoredeals.com/survey/userfiles/files/lolexojedagefefedilo.pdfIn PDF document text
    • http://12shio5.com/contents/files/xaloxebavofebifawatiz.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16163ab5dbb872---48174245995.pdfIn PDF document text
    • http://soles2walk.cz/data/file/14777959744.pdfIn PDF document text
    • http://benly-carson.com/product/files/zesagezizosuduravuli.pdfIn PDF document text
    • http://canadianrockies.info/files/file/97390125778.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/50578345221.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/o45iuscqututi2phc5qoik9hnt/90206951793.pdfIn PDF document text
    • http://syekp.gr/sites/default/files/file/54360899265.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/fugom.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/xufisezipexokezofa.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/8353122213.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/59125357093.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/EqozwcbAC44/uplcv?utm_term=gta+vice+city+cheat+codes+download+for+pcPDF 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_off0000dc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC94 18556 bytes
SHA-256: af175064e449e2deae6eb24015fc1de2de27e0da624f2ed20766936a7037ee62
font_01_sfnt_off00010d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12592 11024 bytes
SHA-256: 3124dcca2a656cb861ec8e04a3d38761756a96876a5ec3fa9a964ab57b0e68cd

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