Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2d0d33db83a044…

MALICIOUS

PDF

89.2 KB Created: 2021-07-09 10:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 07cf631efbd5ebde3822b2c0460922ba SHA-1: dba7dd6bb56641665b0ea8dd58580eaa2fc1e993 SHA-256: fd2d0d33db83a04465f45b7f4d6f7ef6366edf8adce801f053303f4e555d36a5
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or redirecting users to malicious sites. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d06fbd183ac---diguwabalofativugapasifix.pdf In PDF document text
    • https://andrejc.si/files/file/xudebakuxevogenu.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/22439326381.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/mu84h6md846n6d6cugq5jfu3s3/50048861140.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/00872cff1dbfeb687b142dc05d43a10b/xanani.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/49560978933.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/83658418909.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/ferobap.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a172f150629---wigawebebijanob.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/1bllbpu6l17sc7pnt36l6k63ir/kiteloxoxug.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8963e19ac0---3827447498.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/5cdb6aa6ed04fd4fe4ad1941af3ba5e5/93781759029.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/motamuxawibaroreget.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/16094779224.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/rizaxazesanox.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d10814433---92094746756.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d5aba610755---39915315974.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/8440253610.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48fad6ccb4---92052371321.pdfIn PDF document text
    • http://bociany.sk/media/file/45168060970.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e572e6ffe4---lerixafelujidakirovitor.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/jezobopel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=pubg+song+download+mp3+englishPDF 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_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 17456 bytes
SHA-256: 3810ab64ae33a408f731cd776cb56d42bbbcaecebad6d823e6c890aaed1088e8
font_01_sfnt_off00012619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12619 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E30 11140 bytes
SHA-256: 0b65706b4f99d2910d544d542faa618dcc68e2e3ef5d0d59f11250a3909c498e

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