Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f7b7564c70e765…

MALICIOUS

PDF

80.3 KB Created: 2021-06-28 20:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 62b7238af7b0bce686b12dad179c0fec SHA-1: 0426854994e7d3480c986088c56ed675dcc4721a SHA-256: 09f7b7564c70e7652119439f91129a9ad242ea16b757a42d87aae39e4b9b581e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites and are structured as link farms. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggests a phishing or trojan distribution intent. The presence of embedded URLs and the nature of the heuristics indicate the document is designed to lure users to malicious external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • 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
  • 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://chcial.ru/uplcv?utm_term=you+are+adored PDF link annotation
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857d24ee801---80240293784.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/porevukori.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/21204998662.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/50m829tn87u4pmu3vd102o8n65/13229814637.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c48fa7ea2fc---84973310450.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/39978844552.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778bb70dbac---gajite.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/lenidabomijibewujuv.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/panozowadigupuwalowerumi.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/194ad7bbf8935620cd7f1b01ed243a4e/xubumivuwezapole.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/9f058b08cc4f7554c124b132e2a67c36/55142742384.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16093c87938a4a---jubebefejikutijejofa.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/1824606615.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bfbeed3776eb3a62096b2f96c4a0c055/53158820546.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/53655247893.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d933dca26c---fanod.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/ba510ca0448be2f06ffde581db138937/58492558486.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a88a27c3f---teziwumuvazajusabu.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/38524877064.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812e907d46e---84575606877.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/zoferekeledog.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/24188402214.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/85030768851.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/af93b7b7039621c7716bbd50f7b40f7e/77429879329.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608190e323f8f---lorofaxijosug.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF233 17280 bytes
SHA-256: ffaee121ee74aab0cff1e2ee78c5a72c6aa314a05506bdf0b0e1cd4fb0f73b00
font_01_sfnt_off00011f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1