Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfc2da4994ce024…

MALICIOUS

PDF

68.0 KB Created: 2021-09-14 05:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e26b07e072bcde228932110a319610de SHA-1: 2040c0f614fd6b801da3be896a1b615050908201 SHA-256: 5bfc2da4994ce0240c62d4d32a1d4d52bfe4f786dc664a3839c654fac99b52a0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including an image-based design and multiple links pointing to potentially compromised websites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the structure suggests it's designed to redirect users to malicious content hosted on external sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://canadanur.com/resimler/files/6143759250.pdf In PDF document text
    • https://a2designbg.com/userfiles/file/61243316363.pdfIn PDF document text
    • https://basisangka.com/contents/files/52788497082.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/zetibanelowaw.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/45866113321.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/5486310498.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/17746156178.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/bawifudunekuso.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/34074915372.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2c9e6d846---58675130885.pdfIn PDF document text
    • https://ekransamara.ru/files/29962032680.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/zavafu.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16135c2c03abd7---mabobi.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/5889878509.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/disopenilevobaravojogoxep.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/86515540656.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/87309470484.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/31a110fe3045ca5b0d222c8aee4aa4de/sugufepigotasag.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/59234927021.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613456e8bb804---sovadakizezuxak.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/95475337801.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/26141560673.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/zozekijevitafiku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=convert+pdf+to+epub+kindlePDF 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_off0000afcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCB 14104 bytes
SHA-256: 5ac7c0ba6f7542683872a2a30628313fa3227beea8a7ce94535b4899db71a8fc
font_01_sfnt_off0000d2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D0 10588 bytes
SHA-256: ae434b1327732083247dca794a1c8da81a67f29c3d617bc701459ad5be627d85
font_02_sfnt_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1