Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c8f56083a537e7…

MALICIOUS

PDF

99.6 KB Created: 2021-07-31 23:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fbdf5603a361976363181f2d6626732a SHA-1: 647a2469833708a92e1fdd0301dc74cdd11b6bed SHA-256: 66c8f56083a537e7028b755056c39dfd8f1492eff77d329fe335b2a518d22f34
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous compromised websites, likely to facilitate further malicious activity or phishing. The presence of a 'download button' lure suggests an attempt to trick users into downloading additional malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=vaaste+video+song+mp4+pagalworld PDF link annotation
    • https://zifu-tech.com/app/webroot/userfiles/files/vunukobogetol.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/pi8b7u15a92851kk8qs6vb0nut/jekenedepir.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/jufvf8mf4crej5tnc2nurqkrtq/xokugomajuronexuz.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e290c7329d1---88893540816.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b220d5d0c44---65110646849.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/rudevegekozuvipawilege.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/e58c5d6349ef09c98b2d6d5d439a4e1a/86528044029.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/libijifixunotulivaf.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92a5494ad6---45706992632.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/7294298989.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/78681445950.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/onctvkinqfisfj3orh5j6d3sv7/65637012440.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/n2f5k1vv4d7ge3evv6totkc2q2/14735890234.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/grn2c1a81tkpkdq337h6dochfp/93968289347.pdfIn PDF document text
    • http://clingac.com/d/files/29699624151.pdfIn PDF document text
    • https://digireg.es/upload/riwawanotevuzapoxitutov.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8116092f3---46374449209.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a773700440---40852057909.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/c0095369fdca1e818c71ce0c12148674/nubipuzovosowuroluf.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/0e84803e353452906ed93af83cfd87a4/8264797515.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/bexepupere.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_off00011e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0D 10932 bytes
SHA-256: 285d65530d18b36370bbfc59f2b2b84cbfc55d6bff6ea51609940a28caff39b0
font_01_sfnt_off00013740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13740 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F52 17628 bytes
SHA-256: 53c468299029b93fece34179c0794494d979cceae3d60e4153d516a18d385780

Open this report in the interactive analyzer, or submit your own file for analysis.