Malicious PDF — malware analysis report

Static analysis result for SHA-256 75156aea202ec310…

MALICIOUS

PDF

79.2 KB Created: 2021-09-05 15:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 42a745782699258b84f86a1f794f9ccf SHA-1: 7bddc5e5929f922cc2737f29af8ca7d190183cb4 SHA-256: 75156aea202ec3103ae2f58cdb5074165879712e2ccfc2caea77332e44854858
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external links, many pointing to compromised websites or disposable hosting, suggesting an attempt to lure users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://indianspringhomes.net/userfiles/files/nopezikotadofinafejuboti.pdf In PDF document text
    • http://temple.mo/userfiles/file/25341398627.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/64a744498b3e728af44fc4f51cafccd6/74587527277.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/88908510232.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/xekikedasopak.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/rolik.pdfIn PDF document text
    • http://tms-operation.com/upload/files/wikoxuxilubozoj.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/sipujomagijevipugi.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/36023007784.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/90e7694d75184684f812a94e7744e89b/47445256238.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/gatufagase.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/palazaluwitanaru.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/ligufim.pdfIn PDF document text
    • http://heizler.hu/files/file/46557262864.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e020168582---55553989107.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/60185088775.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/89396818712.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/c79575635d0e39e09367d35192763156/soxibetejof.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d1eaee0078---nigifawuvenosufagalepupu.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132277f30c61---99964818973.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/78366621041.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/mavukenowejuwemenuzevito.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/262e062075717a8ecac674046c528b3a/27673742437.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/9trjtr2t2verkhlodskh5hprpt/20384793107.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16109f0c9e726e---gigobowoxivuvikozos.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609889960b164---nevadapasawilelujaveg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=pdf+macros+excel+2007PDF 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_off0000cfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA2 18204 bytes
SHA-256: a0c1c42780afefc96a5bb2658381ad0a144581d2ccabb5daaf2f5488f6eec536
font_01_sfnt_off0000fe55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 10736 bytes
SHA-256: 17db49832f7b695d63569efec6eb2fb54dfe775122faebd26208275c282d1d6a
font_02_sfnt_off0001172d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1