Malicious PDF — malware analysis report

Static analysis result for SHA-256 966228a8160f0421…

MALICIOUS

PDF

82.3 KB Created: 2021-09-02 17:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e6e6951bedbfd0d096ea4a81ec3f37e1 SHA-1: fef6f2432765f92e217648d0ae49fd6b5a50245b SHA-256: 966228a8160f0421e2947d925ad3c02b1f6bcab6a2108bca54663fac0c385468
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous external URIs and link farms pointing to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://philabc.ru/uplcv?utm_term=traditional+medicine+in+africa+pdf PDF link annotation
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/1avdp08aotddkdn52pdd03r098/ludubosekivojig.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/kakitunebedere.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/d0b3b4f168b33508cbffadec503b0e46/61025932090.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/8djbdij8cd162frbqh13kt23df/pabatilukasujo.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/v496lu9inbhss8agqrq4r9om91/56272747959.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/8225323772.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/d5dcc583b51420827643dc6ff4166650/99842941370.pdfIn PDF document text
    • http://terminsk.by/pics/files/86912515535.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//50020224667.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/85767961827.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/41306887477.pdfIn PDF document text
    • http://www.extramas.com/userfiles/files/52014632590.pdfIn PDF document text
    • https://uniontend.com/userfiles/files/nerikabudemavademek.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a05690a04---75686390447.pdfIn PDF document text
    • https://ever-progress.com/upload/files/44112733033.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/47987629600.pdfIn PDF document text
    • https://dafelia.com/files/raxosulusabeta.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/gunoxinojamoj.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/xenogewiginowegigam.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/kawoba.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tunewakofopidugavitodiso.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/nonipufadetavevukifizigur.pdfIn 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://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_off0000dce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 10576 bytes
SHA-256: dd6e17c473f7d39319329ef4b224e401c97c406edac92618c2420250cfcdd853
font_02_sfnt_off00010d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D02 17972 bytes
SHA-256: 5bf918ab9607ce329f16cc5a97e54e25afd070880106982f69125e174821213a