Malicious PDF — malware analysis report

Static analysis result for SHA-256 0364cd4279b88e06…

MALICIOUS

PDF

89.3 KB Created: 2021-09-04 12:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3d8f7d6cf79f2005d999bb16cf8ab041 SHA-1: 59715ab0f11dffc0e20323bd89518b201a20cd27 SHA-256: 0364cd4279b88e068e0d425799c13b3e699463a5be5e1d99448133b403b5bd99
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content. The 'SE_DOWNLOAD_BUTTON' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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.
  • 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://khacdautron.com/Images_upload/files/50708012871.pdf In PDF document text
    • http://adance0112.com/upfile/editor/file/wufakaf.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736f5d89cb9---gumomefotix.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/25110397936.pdfIn PDF document text
    • http://parfumland.sk/upl/javivipokenorik.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/wekokekavadupuworavigaxi.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/mogogidolanosatopixi.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/wupuwideke.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/nabatobuvopumokaravome.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c61ae40a914---bewaferusaz.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c089fb8e357---43554919737.pdfIn PDF document text
    • https://ivanamihic.com//files/16094770575.pdfIn PDF document text
    • http://hyundai-baoloc.com/luutru/files/xupunivoselivivamugema.pdfIn PDF document text
    • https://samowar.ch/upload/file/neremilexatepirolesunafi.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/83423429576.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb39d54a14b42b8cd1c065f905c43f82/59657672324.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/45203310254.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5c27e982f---sanaweponuvowanagidexoj.pdfIn PDF document text
    • http://solsethreunion.com/clients/f/f5/f56c6d7ba488b74ef40bd02d3fc4d0b2/File/31326162278.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607857d64a5cc---94818765210.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/fc5c76e827122585001f66f0779494dc/navipazama.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/14572042109.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/tisipuxogufel.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/6f18f68b6aa982d73a4a59cf6e21a806/66260321103.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/56119843206.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/kireni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=impresora+virtual+pdf+para+ipad+gratisPDF 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_off0000f4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BC 18544 bytes
SHA-256: 3b10f1702d174312be29ce9123614e62b017650be5929a006f9d6ff52f1a3f54
font_01_sfnt_off0001245f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245F 10856 bytes
SHA-256: 68b67d5a1c0028f56fc64ba2afe6b63e16cfd9b3911a915f4f4def63b5e6c38a
font_02_sfnt_off00013d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1