Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d9864749f109a9…

MALICIOUS

PDF

69.5 KB Created: 2021-09-24 20:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a894596b8170e1fee482d6b1e531aa1e SHA-1: db80c3f3610d9355a281f205d72d866ca8196c50 SHA-256: 01d9864749f109a90228ccaad935e0593fbcfdfba8460a4815d0e9adb440bb6d
86 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious due to its structure, which resembles an image-based lure designed to trick users into clicking external links. The document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of multiple external links indicates a high likelihood of redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 5

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=temple+run+2+latest+version+download PDF link annotation
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/10ca9737b85c620d878b9303088f0977/89542613082.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/xitizijapowefoxafotaneg.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/30402408657.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/kikakewurakogovoxab.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/50534138422.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/43522072794.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/gavisigarisilagidire.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/86729495427.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/81073083604.pdfIn PDF document text
    • http://bladensburg.abwingsmd.com/uploads/files/44180773999.pdfIn PDF document text
    • http://splogservice.ru/content/file/fodiladubuwig.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/wixezakegamovokavul.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/4508347354.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/39136459994.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d601d7d164---97818032497.pdfIn PDF document text
    • https://austarpharma.austarchina.com/upload/files/48853923968.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/31972169724.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/rutekasiwetuparedefiwulu.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109061851263927.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/kararoneretofobazupu.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/86627876166.pdfIn PDF document text
    • http://htbestcomputer.com/media/ftp/file/vamifajuxena.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/79339002786.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/59912483390.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/11141985953.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/94396707430.pdfIn PDF document text
    • http://cocoon-source-harmonie.fr/public/file/lirobose.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_off0000b2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AF 14396 bytes
SHA-256: 9dbabe70577e4f0d2b42f2c93f973d0cff5b34f93afc87ee39d698e5b6ae24c9
font_01_sfnt_off0000d6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 10888 bytes
SHA-256: cc364aff503c5893a363b5659cb68f1c1a2bd309e637504c66a89ac1f5e8fb34