Malicious PDF — malware analysis report

Static analysis result for SHA-256 92cddadc9ee3c848…

MALICIOUS

PDF

86.1 KB Created: 2021-06-30 19:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c3050dd940889f9162ebdd6970c31d4 SHA-1: af89d7e73615e5bcef98db33f87a3b44cba05ec6 SHA-256: 92cddadc9ee3c84858ccd8adb089d5add05c1fbfe2e1345f7ddba9613d14ccf5
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. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or SEO manipulation tactic.

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://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6aac1facb---satotume.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/e2b12aa7f1d8b19532e13a3eada125a8/pinilara.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885017c5cbe---dofifomubapuzalit.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160be5ca772171---8478501832.pdf
    • http://onishi-kyosendo.jp/archive/58017516463.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b75283c49ed---kosumo.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16097e45e203ff---59047085014.pdf
    • https://kund-in.com/userfiles/file/49486184293.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160976dccdf359---kowiparemuse.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8808e67fc---podinagodalotog.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/t0emu9qn25ftph6uk7d981rc6a/wojelin.pdf
    • http://aps-mes.com/files/file/90355270156.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097248c9004c---zomubarujuborekoz.pdf
    • https://sporyolu.com/resimler/files/35699122454.pdf
    • http://zjhywt.com/images/upload/File/58672729878.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c10216364df---kudilenewanag.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/9fd8f35c5a44eeb9286dca78f2fe5bd2/28273042008.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b14f1337c2b7ed6f746274512b726eb/polapasevu.pdf
    • http://eperon-kochersberg.com/img_db/narofe.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/oi9i686tm9ulcdged6snhm08ms/zibitejafolakemoxori.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a28bfcb235b---53853015634.pdf
    • https://advance-pack.com/editor_upload/file/91643135683.pdf
    • http://kapli74.ru/upload_picture/39536470545.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e535dbcc4db020cb7ea5e312cb46f704/gopekupakaxugir.pdf
    • http://thestarbusan.net/FileData/ckfinder/files/20210615_12EAE6DBA71A933C.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=pluto+distance+from+earth
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeca.bin
c30dcb8230f2e7ea03d0c16802637970ebb2ac491d7785c62a71d224020af239
pdf-font-stream PDF embedded font (sfnt) at offset 0xEECA 16728 bytes
font_01_sfnt_off00011a1c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1C 16792 bytes
font_02_sfnt_off00013233.bin
9dafccca981c5520f0b16c5baa2315267c15fc1057cba48729bcb84f505d627c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13233 10844 bytes