Malicious PDF — malware analysis report

Static analysis result for SHA-256 8192ea10ca284697…

MALICIOUS

PDF

90.8 KB Created: 2021-08-08 22:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 800cb27d72d12d7bf24008f8f4e24d8e SHA-1: d36860b594d4e968387363c9cda5b07893e81134 SHA-256: 8192ea10ca28469752ba00b963a8330935bafea410736d9f4debf578a2648910
96 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. It contains numerous links pointing to potentially compromised websites and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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://bursakaynak.com/userfiles/file/roxuga.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5a7633b4e8---sodupoxipoludiniw.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/lirubop.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/e41050f1549755a592ad75b5f479a2b8/95912847630.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/quv524veog9svagqs1cdta1ed4/lolilolasifetiwejakes.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/09644e30d65964fe08a11476aefccfe3/jenazotoxiv.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e6b3ceb79c4---61953461134.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/dc52add4720eaf8826860c7beb965eb9/lusezovisawisirum.pdfIn PDF document text
    • http://ewtch.com/upload/files/29641642991.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16085313065bce---vozekonidezo.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd592cd796---pexuxugukem.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/gusabibetapisutojumut.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/13553616785.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/23031683581.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021080505475488.pdfIn PDF document text
    • http://wenxuezj.com/images/File/70564864110.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b844f6877f0---jekifonul.pdfIn PDF document text
    • http://kbchina.de/upload/rifosojenewenezetolugu.pdfIn PDF document text
    • http://minerva-collection.net/files/files/81474455595.pdfIn PDF document text
    • http://greenbrier101.com/userimages/ronurovanibegufezaba.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/vimudotujozopegafelofigeg.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/wotubegavotisogatudafig.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/gamitelixunebexixox.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/kakun.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d4d56a9e3af98a81f163dcaae408c3b5/taxifolakobexalave.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=in+what+order+should+i+watch+all+the+marvel+moviesPDF 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_off0000fe70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11682 16932 bytes
SHA-256: 06f274ef6d92ed282e32fb8664db6616fa93a99aec8b77ce6aa40e031009226c
font_02_sfnt_off0001427a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1427A 10836 bytes
SHA-256: e93efe6d1ade5b3671b028bfe800efe1926d007eeea70acdffab53cd5b7b9801