Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac3edf796b6caf9…

MALICIOUS

PDF

83.1 KB Created: 2021-07-07 23:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9efa11b4374b6617532780d9afcd1223 SHA-1: 0a87b79cd48cf8724b93a6cb5768502390ac0ef6 SHA-256: 8ac3edf796b6caf9a701ed24e03ec1c9e2857460a6600cc0f9678346ef9c8d3e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, suggesting a link farm designed to host malicious content or redirect users to phishing sites. The 'SE_INVOICE_LURE' heuristic indicates the document's content is likely a deceptive lure for payment or invoices. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b368cf9e---59465212158.pdf In PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f04258b0115f2301bc165c176a3e7aee/womaxewuk.pdfIn PDF document text
    • http://vitajeans.com/ckfinder/userfiles/files/xatixevagov.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/8c50cce8b135e16e38455452cc3381db/tokugojix.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/42649424485.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608527aee3a06---bifebefimapugux.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/88555654181.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/eeca7aefc5e1db0f1ed83f631368907f/95002161279.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a364db09---57570947594.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/i96vsl0lfp68498jb8mbodskm0/45327278218.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/79629446014.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/70611991771.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ed65757ab---81228923248.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/k462k4uue970ge5vl6k28r6tnd/32544500981.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/kasobakojamufitumigiw.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c7a362cbd---janowisuzezexewixurewa.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/72363225845.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/b96a2b27bad93087091eb2f308dc5a48/899309662.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/xavofifadosajito.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/giduropuw.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/61111300832.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/3efd12f751ea494e3271275650ba3cf0/26187543466.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/6343079103.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=default+credit+meaningPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/b9140614a0ae9ecac3852e557039cf1d/63309262965.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 17204 bytes
SHA-256: b1b3edbe02d7f20648a298e12882e05cc92c940b2d652538a9bf6d85e1ac8c3f
font_01_sfnt_off00010d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8E 10632 bytes
SHA-256: 2f52a0566cf163e66919c66c04a578baa2cde5dd7ad3b002f020951afbce6a24
font_02_sfnt_off000125a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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