Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0501fe4c9098e27…

MALICIOUS

PDF

88.6 KB Created: 2021-06-28 02:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7b8f8b2c72d9d5a9f7be59d00277a8db SHA-1: e42d67de1ac15ad927b0e9022f3ae1fecc2e1845 SHA-256: e0501fe4c9098e27ce2cddc16cf70171131413a28a36db7bfc224d23075d2f46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis strongly suggest a malicious intent to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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 http://www.mediagrand.hu//data/editorfile/62126799377.pdf In PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/9554a84e0acd1db5cdf64234fa4687b7/rilikilabaxodusipe.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/59475646886.pdfIn PDF document text
    • https://nevisnews.com/userfiles/bisugabanavaduf.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b58065edd---53957059332.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/xufukepoj.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/1a3c3t90ejls2fj8qruu10jtf2/fuvepobopilejewojadis.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/c09ee8c2693079cb2449b6b6013853a6/23664549951.pdfIn PDF document text
    • http://nprofit.hk/userfiles/ligufepemagebupedi.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc595bfd50---25109080865.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/busirapubobox.pdfIn PDF document text
    • http://hifi-markt.org/kunden/kronhardt/ckfinder/userfiles/files/zekemisuwabenuxifaben.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609643bdc298e---gelezopu.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/e5aa8d8f7dcbfbe8becdff4703b685ed/jozimokadupun.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e14d18ad86---zixegubuluvug.pdfIn PDF document text
    • http://okwecare.com/usr/userfiles/files/muvewodemabomuba.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/95965094758.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/7ueboqvv4o4oi6oev1blerrjdc/48823788436.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/nomulofu.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10297015253.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/lezajotamebolubomubaza.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/a471pdsumt6hu2mmr6ip49h79g/xebomutuwoniligadis.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/ae4c6822fc3e13850e8e12e7953175a4/malam.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/16349426829.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=a+lion+a+witch+and+a+wardrobePDF 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_off0000f870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11082 17592 bytes
SHA-256: 5d0f3bea077dffd9f0d6a4f33eb9b4510daa1318424776918fd598a33d8d66d4
font_02_sfnt_off00013d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D86 10508 bytes
SHA-256: 2503611968b05cdc4c116976eaa468bd26e7728b2e71978096eead82559aae69

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