Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ede62317fc092b…

MALICIOUS

PDF

92.3 KB Created: 2021-07-13 10:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 557f0e6c44665796d39fbc225f84ccbe SHA-1: 3412a79c5a1dc72393f23560d61ed709bd5443f8 SHA-256: 37ede62317fc092b5e1e2982763a20d4c203992831c68a75961f312b9e15189a
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://ifaistos.reality.gr/~triantaf/images/file/sixowibebelapujuwixisisa.pdf In PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/1b83f39c3be6623f8d6b21b4fdc1b9a3/junupusap.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/69215122184.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/el4ch8pk7iqv4umka48q4lh8f1/70179255217.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/tewili.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/3f6f5ab791047dd761c8d90a1e9ac272/xevimofidupawo.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982ed9e9f75---dikupelajigebire.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe08b0b07c---60891227145.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/74337150759.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/bipuzekonuk.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098b7e6ec043---naxeporanavol.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/f51c8e0a2918654d33129ac85f768752/jidukikotigiju.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/c69714dd2f1b2f0d19c226b1e4482011/wovetudegigeva.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/03e6fd38a0c650a970c9b95b3746b085/jiludofegifeginaxepa.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/16661128138.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/fcbd3cd6e186a9a35c9f64b6259e62ef/77553777967.pdfIn PDF document text
    • http://allycatering.com/userfiles/92457871715.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9ebc1a1aa---2772131429.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6eae2fc3a---30922089848.pdfIn PDF document text
    • http://15881588.com/ckupload/files/fapufakisijovuja.pdfIn PDF document text
    • http://vswet.ru/f/9845416893.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/dceb0bdb97ad796e996a4614510c4517/varezoxubotiwen.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc6577520---14015456561.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fb08177b7---pizavegorozexoxajix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=coin+master+strategy+guidePDF 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_off000107b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCB 16684 bytes
SHA-256: 907a3308ea7454ea74fcea0a61624e4c8c13521774f047d337eb75c7cc043a1a
font_02_sfnt_off00014b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B48 10792 bytes
SHA-256: 901e9147415a159846e20d4b939df4fa81c084f60f03f815a840b7d8cc5373a6