Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ab47416c834d98…

MALICIOUS

PDF

94.9 KB Created: 2021-07-15 10:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 47024ae4981f77ab24a59637ef7b87aa SHA-1: 9dd6d196912e47fd3ce1c4f4b9be1b7ace08c0f2 SHA-256: f2ab47416c834d983f60eacacc16d44e4981e2d58a46385a6ae1796e4788b172
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm directing users to multiple external URLs, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a malicious document intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/31710992256.pdf In PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/svss324b5hnogc9tvt3nh9g02d/telutezifibur.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/jtudku5718oule6k7jjflfh871/73525495431.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1f120e2d6---welugobewiruwabineraze.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/pubadesenojukamejipege.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/pigufudasexutijotekere.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609aab810e0ff---nipotesevonusilok.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160d190dc5cb3c---bepenoxorivaluraluside.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/fabivura.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/vedugakonazijeso.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/19371140973.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc09710794---jetawotamaduzadewenot.pdfIn PDF document text
    • http://esistore.be/userfiles/file/xavuwejow.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/120888716b6d086b25f22c59f8050edb/bakonuxeri.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/xirelimirariji.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/duzugeluke.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/57603091875.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/22eb1a361cf43ef38784226b6dbcacb5/16244925721.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd2064bce9---69188775440.pdfIn PDF document text
    • http://beiks.info/public/file/motoxevapi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ron+livingston+the+conjuringPDF 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_off00010b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 19108 bytes
SHA-256: 07c34b4e41ea84dd1aee5738274f89d3c1da36287a41fe6d0a455c37cc0c6bb5
font_01_sfnt_off00013c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6C 10688 bytes
SHA-256: 86d727711053762889e230bf06336e4f1b6a243ac9e7dd81f088798e8643e91b
font_02_sfnt_off000154e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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