Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e60a2bf2496a4d…

MALICIOUS

PDF

83.6 KB Created: 2021-09-12 10:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 3bea6f2d8c6797a8552083a6b268fff6 SHA-1: 9f2acac9e2dcda21400d1d4f94c731ad4b972548 SHA-256: 12e60a2bf2496a4d80c2f96e53c94193e0951988e49594e85552ebe003753a68
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://synerhu.ru/uplcv?utm_term=screen+unlock+fingerprint+apk PDF link annotation
    • http://gernano.eu/gfx/userfiles/files/63936815157.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/5884577127.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/lazosibuzemalovewaxufegul.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/nuzukulosanoraxagopiw.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/70393326979.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/76735624822.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/19723332820.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/xulalapojosawedi.pdfIn PDF document text
    • http://centrons.com/uploaded/file/1291033507613c7cf57420b.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/tujeloloxarejug.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/dituvojivogi.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/3383570573.pdfIn PDF document text
    • https://phunhai.net/upload/files/21864250985.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/18436691391.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/wixawenateved.pdfIn PDF document text
    • https://sabresources.com/FCKuploads/file/41939184439.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161352cc67ff44---nuzalebadoni.pdfIn PDF document text
    • http://naviway.su/upload/files/46942294972.pdfIn PDF document text
    • https://ghnservizi.com/file/90276541348.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131d7e068859---tatime.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/35630651936.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/sodusodap.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210907083140.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/filetalatibu.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_off0000dfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAB 10752 bytes
SHA-256: 9e728569f26c612bd34fd6e3ff5453d95046df031c99bc9c00e8ebd80ff544ad
font_01_sfnt_off0000f887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF887 18540 bytes
SHA-256: 8b07e24572855bd8544f5c1c42213fdf958b60a6f41bd204e6b7b5c2e466fac1
font_02_sfnt_off0001289a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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