Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d14ea10cfe3384c…

MALICIOUS

PDF

80.1 KB Created: 2021-09-03 23:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01afcabd99da34cb0e2c2c0804eaefb8 SHA-1: ef9fd819ca1476e3d254c190f928f3e0f9e3e29a SHA-256: 2d14ea10cfe3384c95a8c539b924b3b5e61389ba8040787c1b169829b5c79b01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=agentes+economicos+economia+pdf PDF link annotation
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16088a54fb83e2---4702734092.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9a6db3b87---9544020339.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/gonomoposubi.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/xetolazaduzajuw.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/rebedapibamejunusedu.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/6bf552d0dd3d9c88ac9818ae03864962/jatoxeta.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/h3kip7u7bh7ou23amjhvbab26c/musiwip.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/bulinemikonapigonuredu.pdfIn PDF document text
    • https://laps.pl/userfiles/file/kopopinasanono.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/72332006789.pdfIn PDF document text
    • http://anpo.vn/upload/files/nukigofupukuwi.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/22384073542.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a06c502f552---27567005336.pdfIn PDF document text
    • https://institutdesante.org/userfiles/file/vobopu.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/9825884610.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/62000167498.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074d6a34ed48---63819052467.pdfIn PDF document text
    • http://zuche0551.com/upload/file/rifuzamex.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609e40bd74645---kekudepubumekejedav.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/sezisorag.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/27829627626.pdfIn PDF document text
    • http://betaempire.com/uploads/userfiles/file/file/xovowunekumako.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/lumuxi.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881f43b55c7---67876082064.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4d4c7eae8---59178940816.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_off0000d81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81F 16660 bytes
SHA-256: ccaad8c2c3ffb0e4d86ac919ece4be3f2dd11c2ad1bbe9b5fd654898d14d07ee
font_01_sfnt_off00010202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10202 10800 bytes
SHA-256: c265680e54706cd5b3dd052c8a0b412d2858ab3a387883bfe27c3e3699a082e9
font_02_sfnt_off00011abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1