Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c165ea92a4e52b…

MALICIOUS

PDF

71.6 KB Created: 2021-06-11 12:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 43f4cf1e5a64eddc5485ad9307c5f9c0 SHA-1: 6ea6f16628c6ad688ee103e059a230f0050efd5b SHA-256: 09c165ea92a4e52b5f5466d9a762e4bd158bc8630c55ec101000989b98108284
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The document body's content, 'Ninjago season 8 full episodes free', is a lure to entice users to click on these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://synerhu.ru/uplcv?utm_term=ninjago+season+8+full+episodes+free PDF link annotation
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc181607e0---zexiv.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/a5d02630d35eaee3313b07351afe5a17/gakasipajorozama.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c21192eef09---vawufagumuzoved.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/3f3916922b853ed3cc8a1498f06c6af7/82638595722.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607beb940cc37---38966775372.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083221419eee---35565950282.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/65958996451.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/b75029a0ecda8a1d5a09000e69e48ebc/58875629294.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/6ec0444e6b10c1c66a4e95d5d5b89b47/ligonizutaz.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869562ed7ad---23451985089.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/en5sbjpj968m6ocg223psuambe/20130439349.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/jijopobawibu.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d02d1ad145---76536742989.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/jowatusimikozaxorew.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/50565205753.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/d802219f15e67e9ec316d1024ccc17e1/bujizukitoreva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6D 3288 bytes
SHA-256: 6ab46f12474e68139f673941b37e9ef79510a81aedee0b72b2ed9b9adda6591a
font_01_sfnt_off0000d730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD730 5448 bytes
SHA-256: 218e89b64b65a046d6b80ec85b5380754874da807df8aaaddb8fac359264a3cf
font_02_sfnt_off0000e9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D7 12400 bytes
SHA-256: 53d93fa295013e9551324a9dd85818fb0603cbe4204169709c7f01536cb46990