Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ba1a81b9b7b4e3…

MALICIOUS

PDF

67.9 KB Created: 2021-09-19 23:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ca4c3a922b1daaab27bf137a78e272f5 SHA-1: 89adf7a21e251ac8f3f3f4178d7a5ae019c46ce5 SHA-256: e7ba1a81b9b7b4e3a50a060f6dc3e86bbab398c5dce7be8ca625b57b6f228e68
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF's structure, being image-heavy with minimal text and a small file size, further supports its use as a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 67 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.
  • 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://allytemp.ru/uplcv?utm_term=gta+vice+city+android+bangla+download PDF link annotation
    • http://biemmecommerciale.eu/userfiles/files/29004985440.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/deremagofuw.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/fovanujilodizenalej.pdfIn PDF document text
    • http://denge.aero/upload/files/vewakudo.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/10042610657.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/fd21a4d2c533068c0eab39a002f8c080/rolebodofadoxow.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/11692288528.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/balazedaxi.pdfIn PDF document text
    • https://malmospelmanslag.se/userfiles/file/47684209314.pdfIn PDF document text
    • https://sanagustin.cl/files/togola.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/lizofubadubigotebuxunekol.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/12303574942.pdfIn PDF document text
    • http://isleford.com/filespath/files/20210916163539.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/xapipigelobarawijazupat.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/vibesijuwafama.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/37195636255.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/71444761617.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/23643668794.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/magalofi.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/95094838397.pdfIn PDF document text
    • http://cachnhietwin.com/luutru/files/64409666449.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/34744418727.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f99b400615---81826368264.pdfIn PDF document text
    • http://www.ap-arte.ro/fckupload/file/56117726418.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_off0000ae08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61A 14060 bytes
SHA-256: a6fc5d5cd9b48c7c27b8df3418450666b1120608ee56613bcab4424099c33698
font_02_sfnt_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 10824 bytes
SHA-256: 3a643b87153d3af53d7c490e15dbc2da8a95ef3a9ebc17d8df1538fa2a103087

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