Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ef7b272935b0c2…

MALICIOUS

PDF

76.5 KB Created: 2021-09-08 02:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4f003ab0f8a30c95e31eeb4fdf31cb3a SHA-1: a02cee3f7cbbdaf56f7d9d98cd8d377cbf323aff SHA-256: 62ef7b272935b0c220b1acc784620b7b4f79c10a514e77a54b101b03fc10e00a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, likely serving as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.2255

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 http://rmgoals.com/userfiles/files/zuvifupokesizelu.pdf In PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/08c182dd4c128b20f4064541bbbc6efd/62404766700.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160920fa6c19ff---wivitadiboxador.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7f97616f5---90761698423.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/vafinekilinotevarogake.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/a9cc650834226d096f4349decd40f1b6/lepeziterobakuvikesun.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/fumavewirefaripav.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3857636a1---21393059296.pdfIn PDF document text
    • https://vayoto.vn/userfiles/file/10272428825.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/94419524223.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/9759glgvtq14g4m1gp47jnlgnp/31395946788.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/30428041264.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/rgjklst4jk98lo79bmpjni0euv/vunijo.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/85674596289.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/57456628483.pdfIn PDF document text
    • https://geya99.com/ckfinder/userfiles/files/tabet.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/tofafutibegisenedubagu.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/28054372792.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160840970d5d31---98914063678.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/4bnfp3acedk0311cpvv0ipv94t/60267415236.pdfIn PDF document text
    • http://btfa.tw/upload/files/mepenanimu.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/23465941688.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/91356008057.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/legivamovukedeliwuludaru.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/61952959303.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/c0d848655de2c238b7ef2757945ebea2/weparatas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=hdfc+rtgs+neft+form+pdf+downloadPDF link annotation
    • 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_off0000e191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE191 18596 bytes
SHA-256: 198562172c421991b2e32643bf8ded299abbb7ae91dfd73e8d0708aa53b0409b
font_01_sfnt_off000110ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1