Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb2ffd382ae82a8…

MALICIOUS

PDF

87.2 KB Created: 2021-07-07 09:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: accfc538a1c4a92354e5ba7ec9584712 SHA-1: 2cbb706d56edb044701e73007e542e1deb3a8a01 SHA-256: 3eb2ffd382ae82a85267e8b4fdf23a1c628d76fd83537c90fcdfbf5fd5d768ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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
  • 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://queure.ru/uplcv?utm_term=the+mamas+and+the+papas+dedicated+to+the+one+i+love+lyrics PDF link annotation
    • https://weyergans-hcc.lv/userfiles/file/88412696359.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608277889f731---kuzebasifikixitaboxom.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/h3lq1hot3ss021ijs22vtvi8jm/47564640206.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160877f3911eee---muvulapidamapedujoposebok.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bafe1103897---dirinotazakevax.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/42922871974.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23c261c077---wezijejapeluxug.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/23557629150.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db64704af08---77795230337.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/0653bf3c972ba2e63cc8e88e4f682c0c/zopus.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/fazusivad.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c485e87a392---19836450185.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/48919759000.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/0b9bc840aeebecd1374d7b4d1c2bb515/gewudal.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/lagaxojolemilinowobumu.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/vapazebegejozufedoj.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/36768880202.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb4cc64d95---xakejolisikegagat.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/78236714209.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16086435d6cdf0---58767751735.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/51859842986.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/kulexivojef.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/19727682790.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084f420a8770---bosapuzobetaku.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/wumigizemozojugupafobotip.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/44c3067fc6b48bdfe5381a25981d5145/xavebotit.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8F 22868 bytes
SHA-256: c4400419d756bc98f4703f13a0ed717c4edb3297ffa9f3751f7a5964a96bad6f
font_01_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_02_sfnt_off00011a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001324c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324C 10920 bytes
SHA-256: d109c0c4ab6f6ea547575a7b232da2c75f141495eea23e25a7c609c47e2d362d

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