Malicious PDF — malware analysis report

Static analysis result for SHA-256 260a7e93b9842985…

MALICIOUS

PDF

65.1 KB Created: 2021-09-28 19:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a66edf27ce2d9e2e3d441e94375c9ad6 SHA-1: eb37cf1e437c2f4fde365ddfb2a59350d8ec6a5e SHA-256: 260a7e93b984298549aca27e645c11546c6a9c277a2441d132a8347da3923ab6
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and numerous external URIs, many hosted on compromised or disposable domains, designed to redirect users to malicious content. The document's structure suggests it's an image-only lure with a clickable action, typical for phishing campaigns aiming to trick users into visiting attacker-controlled websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • 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 65 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=c%23+pdf+to+image+free PDF link annotation
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/14379777603.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/vejitupower.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/87837787834.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/mawebevuwon.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/12460195603.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021092608101377.pdfIn PDF document text
    • http://ippon.lv/uploads/File/83418562411.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/93499585219.pdfIn PDF document text
    • https://successalpha.team/upload/files/sudot.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/losapabupodugubame.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/4166751648.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/wekuludipivalimefenetiba.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/69564796506.pdfIn PDF document text
    • http://borneneskontor-landsforening.dk/userfiles/file/gubabilewo.pdfIn PDF document text
    • http://vkp.ru/upload/global/file/zagin.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/tefis.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/62fd1a7ccf0ff8ac189950edac8a86a0/kabexovomojifusisedojek.pdfIn PDF document text
    • https://ladymamashop.com/uploads/files/202109252023146205.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359094608f4---56508967599.pdfIn PDF document text
    • http://nabisori.com/userfiles/file/zedutuforivur.pdfIn PDF document text
    • http://webbolt.fono.hu/data/editorfile/61171741188.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1614dd89b8aac2---18281267806.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_off0000ab15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB15 13664 bytes
SHA-256: 9418a6784b91d6473ac39c14ed4219edfd51fda01815c2789bbf386423aa05ca
font_01_sfnt_off0000ccf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF7 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804
font_02_sfnt_off0000dfc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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