Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaea7ab3e4d490b9…

MALICIOUS

PDF

95.7 KB Created: 2021-07-17 10:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 52592b094670de32b0a379385f425440 SHA-1: 03cd29da6c35632b91fc450c65507f067883ec88 SHA-256: eaea7ab3e4d490b9cf5d9178d69f5f74cce80b01625cb4e86adf53ed99d0a9be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised WordPress installations and disposable hosting, indicating a link farm designed to redirect users. The presence of these links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16085747564873---65232264077.pdf In PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c338abf129---rorupizazawabupobapa.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/rirepademizanamexivavula.pdfIn PDF document text
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/vejobowunopumebebek.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e223aee49---wufifadenor.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47bc99393c---2233322627.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ea31241f2bae1d53a8dba5729017facb/70198386518.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/60835234374.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4f74e1501---vujajefape.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/c2e8c35fa113ae874822cad52edb0096/16774494265.pdfIn PDF document text
    • https://banghenails.com/upload/file/mifekazajuron.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980a61a64b0---tuzilisosibodifav.pdfIn PDF document text
    • http://kanstm.com/ckupload/files/69064658071.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/rm60dl03ku2lh5kan8evr1p4ju/20745296751.pdfIn PDF document text
    • http://homeopathyhk.com/files/sosijujozis.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/af6497f2db2dee545cba8edd932e11c5/65122913984.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/zaxekiroputinud.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/23371510228.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609a373f90aa7---9201340390.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/60894734536.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/23707728918.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/80755538234.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=the+security+development+lifecycle+pdfPDF 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_off0001126d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7F 17472 bytes
SHA-256: a267b5df3e72c20adc156a69422eb3393b90bc99b4a5ff4ec2bbb6c8d0248e4a
font_02_sfnt_off0001585f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1585F 10968 bytes
SHA-256: bbffd3317d1f31dbcd77291b47e7f0bcd5cf481c8793bddcf69207046ffb8715

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