Malicious PDF — malware analysis report

Static analysis result for SHA-256 1116faee5bab3f21…

MALICIOUS

PDF

63.8 KB Created: 2021-06-27 06:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5d9306bc74d353c6cd1760a2301158e8 SHA-1: c5fb802c92fb72f8644ec46a37ce6fc32fbad092 SHA-256: 1116faee5bab3f219402536e84585da68ee3a14c5f0f59d91bb9e4d55a45ed4b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, primarily through its extensive use of links pointing to potentially compromised or disposable domains. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with a high-confidence ML_NYX_PDF_MALICIOUS classification and ClamAV detection, strongly indicates malicious intent. The document likely serves to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8256

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://anatolianlgs.com/userfiles/file/rojugosovune.pdf In PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609197712ece3---tofopugenovemit.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/c03017688f899e83dae082cf0de87cad/41232751718.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/1b12ru9lce70s2c12sopa19r94/zaragewepuwuguxexanikol.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/54335816304.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210617015840_1211659342.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf967f4f5a8---90254348494.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/40789874883.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/76c9aa23a50f753901c1b5a1a6b4aafd/filanipupo.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/34906746122.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3eef092a---regijelafexi.pdfIn PDF document text
    • http://licausi.it/userfiles/files/mumirumefifeluvudotaged.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/617b22a7968bd694f7d2f6c62359e3b8/zuzivawafarezevotave.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/98786524246.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c85b81ec75---misimimidojerajupisenemo.pdfIn PDF document text
    • https://highrise.pl/file/zepelonalusifog.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/da4ef7c2247faa944257144f7aef80d9/lavevozisewepuzozaf.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/46140630684.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/75997773596.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/6hb1e9s712s9o3f7dvmbsodn97/11748052495.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/efc501adcfe4b5ed8ca62478918a1740/vikufuburu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=6th+tamil+new+bookPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1