Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c83236b9910df1…

MALICIOUS

PDF

91.1 KB Created: 2021-09-02 04:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 527aab5f973b77fe0a62938f9c1b96ac SHA-1: 1a6924bfddc04a3c8f3e49677d626ab0252e0e1e SHA-256: 64c83236b9910df15b5fa07b1dc8a8c17e7558be5b858b79dd1f132096a79c7d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories, likely serving as a distribution point for further malicious content. The presence of these links suggests an attempt to lure users to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc3c69f3c0---92666212766.pdf In PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077c2256b737---55681798009.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099480de2074---gefipu.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/54712911916.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/63237128619.pdfIn PDF document text
    • http://vejwun.cz/images/pomitudesav.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607847711ab2a---9663782226.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b361b12fc53---jivukixoludurutoman.pdfIn PDF document text
    • http://grimastone.ru/files/pumedokapaxezukopajiporof.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/3571043115.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/goctv8h5fuuskmmei8ltb586h2/bavitawu.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/lobozixilazulifija.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070024a340a1---58899849737.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/e35e4482249ee548268a2c6267407fc0/5982102858.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/cbd402e03a652eac0c02f14c2781b1fe/24408296283.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/roxupasavufinupobibetar.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/nigulolawikafurex.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105e66c542ec---99964465504.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/2b1aakm8ct4crc25gcoi1hcgeb/26007180004.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a57276d1cac---53959765080.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/38a26b6492a77d4b14ee599db7d88d2b/nuposunebikevexisenexufuk.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/subodimejozelivoporifu.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9210d18ae---zebedugu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+draw+a+line+in+ms+word+2007PDF 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_off0000fc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11420 19232 bytes
SHA-256: 0a07cd7e0e489474972805f4e15b9e120c39f5a518cb75848d4b651ed05cc322
font_02_sfnt_off000145ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145ED 10780 bytes
SHA-256: 3dd7e5ed6a562c7333c8df9b501a6dc07c91367f0b847c87ffbd49ef2874b3d5

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