Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e470c1bddca3b6…

MALICIOUS

PDF

85.7 KB Created: 2021-08-09 00:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 035a2c3bbab0dc6cd9ded5aacbed9246 SHA-1: 2111f74621b8aa460cba66ad53baf947139d3b5f SHA-256: f0e470c1bddca3b623b1921b3e904348ae99fa61bbfd2bc1005a7069d56aa65e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains a malicious payload. The presence of a 'download button' heuristic and numerous links to external sites, some hosted on compromised WordPress uploads, suggests a phishing or social engineering lure designed to trick the user into downloading further malware. No scripts were extracted, but the overall structure points to a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://ideviceplus.nl/app/webroot/files/userfiles/files/28268306759.pdf In PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d80579745c820ebf9b8258ec73d4cc6a/45266162853.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/tinedoxuteguvezel.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/bcggq2iansc2eq4am4b2ksdrkp/31280665880.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f071aa187---jeritixituwigi.pdfIn PDF document text
    • http://donghocitizenchinhhang.com/uploads/userfiles/file/54259629471.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71561e4aee---73375750828.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/55893373799.pdfIn PDF document text
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/60327676043.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/t02tldjidhr4mmmv2dg846ci0c/86573467291.pdfIn PDF document text
    • http://pvvc.cz/files/magogika.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/minukit.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/da02d34d3baa660158e63f6a134e8362/nafiduzerusoguzugegove.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/kikazototulezen.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/baterakako.pdfIn PDF document text
    • http://bakoca.hu/files/file/vitopotoxopejexisuxaf.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/92717298880.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088902cae927---julemupeboju.pdfIn PDF document text
    • https://e-room.co/userfiles/file/wuzadomufil.pdfIn PDF document text
    • http://fitviewer.biz/files/file/dikadoratikozekovekenux.pdfIn PDF document text
    • http://gtshotel.it/images/file/60576086683.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc83e81c63---23979723456.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=nba+live+mobile+hack+2019+no+human+verificationPDF link annotation
    • 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_off0000e834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 17340 bytes
SHA-256: 564288b727def85aa958253b144f276787177049233382cea9c199a1efbaf8eb
font_01_sfnt_off00011575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11575 11268 bytes
SHA-256: 175db52f9407955d855b72dc1feb11677bbd60fa7d11d1ad527fd4719aaf73fa
font_02_sfnt_off00012fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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