Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ee647811c89d73…

MALICIOUS

PDF

124.2 KB Created: 2021-07-13 17:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 436849f80411827c18ab6cb8f163b30e SHA-1: 1d57c4511ad0027fe6895b5543417ede8033a2c3 SHA-256: e1ee647811c89d734a2d32a131bdaf6cb17ffd5af4d035640d3e9f08c05e827d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload storage and other disposable hosting sites. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://thaide.org/userfiles/file/xutelofezilugiwusifowevo.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/9c8ede35dd7c411a522ababb115ca939/fesolonebinigakof.pdf
    • http://ajtoablakcentrum.com/_user/file/mererixuso.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/e04k7bmr6c4nt5q5gko4v24q22/milipekaluneme.pdf
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/nagezugerimozatekoso.pdf
    • https://szekszardportal.hu/userfiles/file/baxesofe.pdf
    • http://szzxwx.com/Upload/Upload/file/2021629714246267.pdf
    • https://cortemadera.com/wysiwygfiles/file/potele.pdf
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/novunikukigixiga.pdf
    • https://ustunbilgisayar.com/userfiles/files/koretozobife.pdf
    • https://saam.vn/images/content/file/9249693276.pdf
    • http://aeronautike.com/userfiles/file/vukope.pdf
    • http://ezibra.pl/upload//file/tinosesokexezukuloxalo.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e80e749731f---mubowepudazama.pdf
    • https://radiosmile.hu/upload/file/23864867399.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/04us1sjbpn6iblccdac47uqknn/zenit.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16088777c48297---11884496436.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91c0db5b7d---78377695778.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/a885bf36b52d5097b883df98dc4959c3/petigepex.pdf
    • http://maristaslardero.es/userfiles/file/gagunesodaj.pdf
    • https://ebdaatcoop.com/userfiles/files/34922177179.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d32fb916668---3367166717.pdf
    • http://natproperty.com/userfiles/files/96417389059.pdf
    • http://bebelino.ru/userfiles/file/xetiradonubive.pdf
    • https://prosperitas.be/data/assets/file/12103423347.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=henry+viii+first+wife
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001857c.bin
9870aaa6c6ad5c886dce8cf5d74f1aa91cdfbbba8b8a9c691eba97055126ac82
pdf-font-stream PDF embedded font (sfnt) at offset 0x1857C 18276 bytes
font_01_sfnt_off0001b495.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B495 16792 bytes
font_02_sfnt_off0001ccac.bin
cd0f4bc33cb2ad3dd08ef0099fa619133d8116c7e1a2711eaebd8bec25a1df8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCAC 10136 bytes