Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34cbbf6f958afc4…

MALICIOUS

PDF

70.9 KB Created: 2021-09-06 22:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: d920c919f80b3cad92fb1a1dcffb1db0 SHA-1: d4362b69a40b879cb42f8e2c0e95c6f298bf26d9 SHA-256: d34cbbf6f958afc466373ae842ca030f8481090d13a862e5e8145c0f80a6d8bb
216 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, with high-confidence heuristics indicating it functions as a link farm. The document body contains numerous URLs pointing to potentially compromised websites and suspicious domains, suggesting an attempt to lure users to malicious content. The primary goal appears to be directing users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Viral-video clickbait PDF links to suspicious host critical SE_VIRAL_VIDEO_CLICKBAIT_LINK
    Document uses viral/leaked-video lure text and links to a suspicious disposable-looking web host. This is a clickbait/traffic-scam carrier shape rather than a benign PDF link.
  • 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://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836d88395bf---2406971147.pdf In PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/df6255dok32o6lv72hmafir44b/22606227832.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/tefisopirovenelokamenatuk.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/86456535021.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/lowenasak.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/8f8ffa32647a7a3abe0eed405021aa0a/48049049967.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/godijozutizikededesavo.pdfIn PDF document text
    • http://unseretochter.ch/images/file/47983826681.pdfIn PDF document text
    • https://raptiherbal.com/ckfinder/userfiles/files/rekumasizuku.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/69732189698.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/6cbe150a27858ada46933a02a937fabd/juwenasitemekivojomiwapan.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72657226426.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ea13157e7---bajuvorozetutefowa.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/471983507f4c71fa65180220d059f96d/mejoketenazozax.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/nelinilavesawi.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/55700814525.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947cdc9d82d---78138601454.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/27336606778.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/q6gu74ti8hf6a8lg2mk1hgjh9d/20992068673.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f604b5ed72---80023304864.pdfIn PDF document text
    • http://cecev.com/stockages/files/guxifir.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/84606330101.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=moral+reasoning+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 extracted file (font_00_sfnt_off0000b8bf.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000b8bf.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BF 14924 bytes
SHA-256: 2152b8667a98fb98f897bb23b835e034753674c1162d385e261782e02fa876e4
font_01_sfnt_off0000de2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 10568 bytes
SHA-256: 0977ca47b69266c35caa47617b29891cacb3fb8eb56bfa5f3fab93ab51705be5