Malicious PDF — malware analysis report

Static analysis result for SHA-256 106e696dff56faad…

MALICIOUS

PDF

86.6 KB Created: 2021-09-23 23:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b9ebef6b4951ab78c9079754404205de SHA-1: 8dde4df855dc8d23d38d9af234b3ef4636008f65 SHA-256: 106e696dff56faad07e08c7cee71b506dd622cfdfe791fc5821044a197337374
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to manipulate search results or redirect users to malicious sites. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://desiaussies.com/ckeditor/uploads/files/fakalifonuwamibom.pdf In PDF document text
    • http://gianenricofabro.com/userfiles/files/14735433363.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/guzoloredazikired.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/48646061606.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fimugisubonetasube.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202109160433009626.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/momaferojugovovokojito.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/xowulozapujujunorigaxuv.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/xadofinerezigat.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b44a183844---xupozepatixaruxilixepas.pdfIn PDF document text
    • https://suruburi.net/mm/file/98353273774.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/bakajakuzejutavako.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/nixonizogebizavo.pdfIn PDF document text
    • http://dentistturkey.com/image/files/95143336220.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/diwonutivisozeweteg.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/98008124479.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c74f9bb086---jepovifogikevos.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/90186954355.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/jesewudozeba.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/32932018810.pdfIn PDF document text
    • https://network-italia.it/file/vavawijixasubesa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=powerdirector+apk+without+watermarkPDF 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_off0000e871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE871 19908 bytes
SHA-256: 29c7810796c836aff25182dd0bacf1fc285c27c61f36ae01f74e4261d5291f68
font_01_sfnt_off00011bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD1 10740 bytes
SHA-256: f8d5334e8403389ce2fd35696aee6e05160389dabe28d7a85a7dd55fd46abbae
font_02_sfnt_off00013499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13499 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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