Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56ad02d8efa24f2…

MALICIOUS

PDF

69.3 KB Created: 2021-09-25 23:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ccb27b1cfd475cc5c77c30e9cd9f8c38 SHA-1: c39f676b3e21d1c3161a117897ba3a3cb49a70b8 SHA-256: d56ad02d8efa24f2896cd91ae8de79464abcd2626c4dab7358d58445dc558cc1
146 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs and is described as a link farm on disposable hosting, indicating a likely phishing or malware distribution attempt. The document's structure and embedded content suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://smidgel.ru/uplcv?utm_term=android+wifi+qr+code+scanner PDF link annotation
    • https://homeuu.biz/upload/ckeditor/pages/files/vezaradexidibesetes.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/nezitironet.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a1fa3ed813c9b34dc5db40e1d3ef3f95/48308158207.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/pemuvefedunagoj.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/95651020897.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/62952215702.pdfIn PDF document text
    • https://nikolsbeauty.com/webroot/f/uploads/file/gapiz.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/xigigewuwagowu.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/52833645877.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/gijafevakubu.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/wabovuv.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/8624175626.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/tumefavirolexupipol.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/jumijoduwejorixoxawog.pdfIn PDF document text
    • http://rc-saty.cz/gais/image/file/88568709393.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/fukafofawovanofalo.pdfIn PDF document text
    • https://estoniapools.com/contents/files/89516602084.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/23962379773.pdfIn PDF document text
    • http://princeverma.in/uploads/files/23836027146.pdfIn PDF document text
    • http://sunway.me/ROOT_PATHuploads/file/050241015414.pdfIn PDF document text
    • http://mextro.de/upload/files/zepawegiwuduju.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/64527798219.pdfIn PDF document text
    • http://bptramptour.pl/files/file/lonekililuvumuxijoxarif.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_off0000ae38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE38 10536 bytes
SHA-256: 1ef23b777a412ce89cefb48c1a37baa36ed2cff782b6a7335a33a0b972020ee0
font_01_sfnt_off0000c630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC630 16268 bytes
SHA-256: bfe705a23a6e106bc12b45f39ab9e2272f0d400919fb57a940295a4703ccd76b
font_02_sfnt_off0000efa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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