Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a1668e62fff395…

MALICIOUS

PDF

84.7 KB Created: 2021-06-25 14:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17ebc83987dea633da7b35243b1a56ed SHA-1: 61fd62644d5178a43ed03f7f2199622ad2ba2698 SHA-256: 01a1668e62fff395cd96d2c0ae4bd99210f3715514741500c2864268f9e9337e
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised websites, likely intended to host or redirect to malicious payloads. The presence of numerous links on disposable or compromised hosting suggests an attempt to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://ilexgold.com/app/webroot/files/userfiles/files/93754324167.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ee1150b12---wirubulobivokijoxomige.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c47a16724---lapufuzo.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607292247a9c0---94174438133.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/1qcdh3sdi5kol9ucjs7lmb61pi/bofuzojixenivamowilupiz.pdf
    • http://lideparts.com/userfiles/file/1623974253.pdf
    • http://dwhs79.com/clients/15834/File/jexofomegot.pdf
    • http://banhangcongnghe.com/upload/FCK/file/30187960714.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/a8b151e0bf6d19001828cba4327cb2a8/44191959291.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e88832f8a5---80350712440.pdf
    • http://www.contectrade.hu/fckfiles/file/lawenudevagivadola.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079f3dc7fe5a---wuzobumujanutukemapagab.pdf
    • http://immodraft.nrw/images/architekten_agentur_images_/file/gifawasune.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/e46e9169e66798ac7d8a7db3c6cb6d29/zofebigorevufodog.pdf
    • http://homespakistan.net/magzine/uploadfiles/file/bubonirole.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090290ddd1fa---gugetugolalifu.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a780d5427b---pivufijebizab.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=warcraft+3+apk+free+download+for+android
    • 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_off0000e635.bin
871138e1c7f0c5480dfcd1b201f92d5b97bde311645693b661b99019c5d5ca4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE635 17860 bytes
font_01_sfnt_off0001132b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1132B 16792 bytes
font_02_sfnt_off00012b42.bin
36442003fd1a9be85b3ebcc9e930631b0bf45aefe7a91d6318237a3def914874
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B42 10788 bytes