Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d819ec9c4679b4e…

MALICIOUS

PDF

240.8 KB Created: 2021-06-11 04:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cb78e808a0430b338e089f02c832fb64 SHA-1: 7af5a2fe8d9348e5ac16d4c18116903ce87d9363 SHA-256: 0d819ec9c4679b4e7fe31447f9d68f4899e7ae50ef00b4d6dcb625ea551c7a40
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains multiple links pointing to compromised WordPress upload directories, suggesting it is part of a campaign to distribute further malicious content. The presence of external URIs and a link farm further supports a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.
  • 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 https://queure.ru/uplcv?utm_term=cheat+codes+for+gangstar+vegas+4+android PDF link annotation
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/99236175690.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608767f3a53d7---53925688241.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072e1ace8016---budodusililisedan.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750e11c78a4---zizuwolarufologe.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/6068737f8652c927586ae6f51c1ead63/neduk.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/92e69ee805e30ef50a39687306da7da9/badafusojamulalizimodilaf.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/e0dba60067626fe81c3ceec99b5a9193/sidox.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba06955da1---funowogatobupin.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/36596028175.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file/%5C/lusefolefu.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/aa44e30856640bb656db814919fb14c9/wuronokororeweb.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/1f980c4d1ecc563873abe2e98caef4d1/mabitofogogezivirededeji.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f09b2bfee4---37638480945.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/37736618006.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/jaferexarajinafomijufe.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/iappuos39o8ud4jgdni0n5mh62/zisun.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/nemebipuwomutumexapoxot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00034201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34201 5304 bytes
SHA-256: 219154860c1d3b9ea7f1aea64c39adcd5e434dd236a3e352dd4ff69ad5244062
font_01_sfnt_off00035403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35403 6124 bytes
SHA-256: 37a1d0c9c4a8b552219e48a89c5283ac1de2d93f32f15cbada81b08ceaa2eca8
font_02_sfnt_off000365ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x365CA 1832 bytes
SHA-256: 886313929a2a840396a9efe1236b0f91371ac8de8ce80438e8dc898f1383658c
font_03_sfnt_off00036eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36ECA 15064 bytes
SHA-256: a1fab0ab328ec512e8a69962b6c3557e54ae6e89edc6c2d436350d9825e585cb
font_04_sfnt_off00039cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39CB1 16320 bytes
SHA-256: 0a71093478b4d45b4d76e64f0f6643daf86e51ddb6e6cf70e5a519f96dfb1fe3

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