Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dde62ad634bea6…

MALICIOUS

PDF

76.5 KB Created: 2021-09-03 11:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: dc3d4398e19bafa3a59eb05b5719e31d SHA-1: 732e13e7b20a514966c13af73ea2f146ef4586b5 SHA-256: e2dde62ad634bea67fa0f04b10d957cfd08b6d9207c2f45282d84b6b1523b9ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised CMS upload locations and disposable hosting, suggesting an attempt to distribute malicious content or phish users. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://alkirbilaw.com/userfiles/files/xuwawakegalavotigemoluwe.pdf In PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/jakapamulojumogebapojoboj.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/36321099489.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9285309720---59470861063.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/nokajiditamososupus.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/3bd5452545d90d18de4b0c30ed4f828c/jivekaru.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/41479065412.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607c65e61e3b8---17900836884.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/kozedibizow.pdfIn PDF document text
    • https://spacio.hk/attachment/file/zinaguwomokiposubisugobab.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/31289871660.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/0f39fc41cd0c3b025a1a49c26ad5e536/mopuwomividi.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/tixitavevokefigebibafatev.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/4gpfn6ijtfc0am99i8psb0q1kg/95662306462.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc1608efb7---bafokuzujavikiwit.pdfIn PDF document text
    • http://clingac.com/d/files/98363621248.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b4229285e---51081555423.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/34127027280.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/c59d4a6f4d1a8481c5ff4cb7b18aa993/mozixojujakefejopa.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/vugizewis.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a0dc00d68---jaxuvomerabegufoxozopeje.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/60806485280.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/bewegogedisadexapopifuloj.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/l8js8bd6eut3sr4blt45v5t6u4/zufogunuboxegetoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=oracle+flexcube+ubs+user+manualPDF 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_off0000ca93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA93 16496 bytes
SHA-256: a9809177a97dee45448f13b53ab6806cf639ebcf7757aa237e8fe762a6e388e1
font_01_sfnt_off0000f4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A6 10552 bytes
SHA-256: 70dffbbd5e52114d14b797bf13aa5c91d8d37749375684ee3915e9b20419ab3f
font_02_sfnt_off00010ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1