Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce26cfc6cb475d7…

MALICIOUS

PDF

150.4 KB Created: 2021-06-26 10:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 320b835e85723c89946a45f2a0c160b8 SHA-1: 599563a7aec7d3f6724892bc7a94392d11622cd3 SHA-256: 7ce26cfc6cb475d78c9166c2c529aee3fdd0f3a9de1cc0e49fdcd762804ca2a9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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
  • 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
  • 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://airbays.com/userfiles/file/74300966726.pdf In PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/fcc23fa35fdf45e6ae03b3d9782baca5/55130684988.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160820de8228b7---xenuvul.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/j7fvldrsao6jjl0hnj24mukbai/takazaduretilenupuwafikag.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cbd4a5fa6---wetewi.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/64589707496.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/68102122273.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160946995a68e7---39747098212.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/fdf417054e9f25343eaaeb13ae2b2dc1/387861644.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/demeribago.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/timizogowarifudogujaxuduj.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/8c8a48c98cf0dafbd0f69e8f2fd79442/migaxogitasizivusedenaguj.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/wanigapiputatovaruwe.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a37c0c73a88---wixudagifelefanegow.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/9222858e2e81a4e78b7e51c568b876d8/95397583087.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/p1lh6avkihl46nv8sgi4ggca50/xapevozuv.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/3n7j74l9ommbcr2d403sp12if5/95923740217.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/kolidimixef.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/56f08ac437d011af30eccaf445aad8cc/99606042361.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609474ccc2476---jedoxemomovunawudixaku.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9e81099ea---99872773319.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607abf4ded315---31285943557.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/98879378269.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/fabujox.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/lekisopeganafavagifovo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=mum+and+i+or+mePDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/rixotodar.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_off0001f08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F08F 17260 bytes
SHA-256: 45113fb2c9f55b7c20735df5ed5aee90c7fe553a7618038d659262d2cf3f8abb
font_01_sfnt_off00021d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21D63 10192 bytes
SHA-256: ef65d2c872c8b00b0ac0dd48ee5c38ff6d63eaa56ebb133dce5670d985d10138
font_02_sfnt_off0002341a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2341A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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