Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0eaa2491a48a3d…

MALICIOUS

PDF

69.2 KB Created: 2021-09-27 02:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3d9f14937be34a1b85d43f5bf2aa8756 SHA-1: 7bf98db4802e3dcc7305b02918e703f9cb82b6ad SHA-256: fe0eaa2491a48a3d52d253ded26d8cb6064c3dd0013b5fadbf99cb76eee78c0e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. Heuristics indicate it's a link farm hosted on potentially compromised or disposable domains, designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://inwebjor.ru/uplcv?utm_term=new+super+mario+bros+wii+pal+iso PDF link annotation
    • http://abpaluso.com/upload/file/3680810153.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/gupiwopun.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/76741366207.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/u95vjt16nvkc05ft0bht43ssid/14717907748.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/danuriwefubedenumimixake.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/dobip.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/fabiretagivus.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/jopegiwokinevelekukupo.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/56219862008.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210912195553.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/49493262822.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/a3c5169543bbe7b8cde3d846c72430c0/magowusomedewojisuvof.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/titikisi.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/wezunorixavafex.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/391e3c3be7dc1a117033a084e810aa40/85475599741.pdfIn PDF document text
    • http://lejuriste.ru/files/file/37116782183.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/36555202455.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8b2d6d068---28005937341.pdfIn PDF document text
    • http://simsvizag.com/admin/uploadedfiles/file///389267426.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/jaukfvgndocrj0cnq27d9nmg33/ribasuzanuzikanufok.pdfIn PDF document text
    • http://thewesternmist.com/userfiles/file/vekuxodunojexozutavi.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/j3rbb2d098dkvaorh03k1eirhv/bafogid.pdfIn PDF document text
    • http://ocung.net/img/files/naxajimukabefezefivad.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/lexonodusagivusemexijumu.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_off0000b258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB258 10512 bytes
SHA-256: 3e6b543835ece8fb68e8c72f321726ba0d5f3c95f4e2d73bb77cb4c5e2e736f0
font_01_sfnt_off0000ca18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA18 14184 bytes
SHA-256: 9cff827c9b5f911de16ffc3d6b594a50fb833addd592e0e39567fcec2bb8be4f
font_02_sfnt_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1