Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab26f78a812ef8fd…

MALICIOUS

PDF

85.6 KB Created: 2021-10-06 10:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 5ca0e3ec95ef47f3dddaa82bbd192f85 SHA-1: f80607a260f1d22d825452f840b44ad0f492d6ea SHA-256: ab26f78a812ef8fd94b685d3cb074b08dd225ba825c7d97999251c23a12be166
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

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://mps-india.com/userfiles/files/dejaledisezafidevevipifet.pdf In PDF document text
    • https://enilubricant.hoakhanh.vn/uploads/image/files/wakotokos.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/5857798859.pdfIn PDF document text
    • https://www.thic.net/plugin/ce1/ckfinder/userfiles/files/95972479558.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/20168382947.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/6eaa6f50cb04815cc1f4e61841bd5c7a/jesobemovefebas.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202109021518097807.pdfIn PDF document text
    • https://slicktechproducts.com/newerac2c/userfiles/file/dunoxatezizo.pdfIn PDF document text
    • https://babamansurkurhuseyin.com/uni/yuklemeler/file/zowazapatojoxinig.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/dixefebituf.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/96679632122.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/depexatofadomijuzip.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4525fv7eqfgbk17vab3nmggt66/zanejarukig.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1614bdd05ce671---vemelebetixevukajuzamipos.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/73968111393.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/kupuxoxux.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/ritijofuvaliravet.pdfIn PDF document text
    • https://ottopianos.nl/files/16585642922.pdfIn PDF document text
    • https://pkmoscow.ru/ckfinder/userfiles/files/doxanarifiwuloko.pdfIn PDF document text
    • https://nusbetaja2.com/contents/files/25482300734.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/99336482764.pdfIn PDF document text
    • http://tasfor.com/files/galeria/files/filusokezenanid.pdfIn PDF document text
    • http://geasit.it/userfiles/files/nolibul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=list+the+properties+of+soundPDF 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_off0000e3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFA 10444 bytes
SHA-256: cc075b41ca0636a4e23fc81ddfcfb28708c8427b092f45bad235ae5ef6845ff9
font_02_sfnt_off00011393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11393 20420 bytes
SHA-256: 0883b77e8b0993c44b83791e2f9ea10186c7d80d5e78dacdf865a975e58d3903