Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd5e6eaf791889b…

MALICIOUS

PDF

76.4 KB Created: 2021-09-07 17:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 31900919c58da180f841b237245229c0 SHA-1: 1e8400a09b0551348a9498192ceae94147b12112 SHA-256: 5bd5e6eaf791889baa6597a190993fccfb86d1bf0fb0954d0028263371c7df3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, hosting numerous PDFs on compromised WordPress sites, likely to distribute further malicious content or phish users. The presence of external URIs and the nature of the link farm suggest an attempt to lure victims into downloading additional malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d45b2d4b55---82831117674.pdf In PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1941e26dc8---remimuroset.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128c5218bda8---rirerajoge.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/sepopanazepexaxaduwugusad.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85fb29510---30478248736.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/xokejilotilo.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/45798658853.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b66837cee8d---junafubofosiva.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086d465ca9fc---31024483878.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/mufidimoduji.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/78615891215.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/dazogegutamu.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d16fcd9e0---29242633980.pdfIn PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/7823107339.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/pizalepamof.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d2e7776732---15426186634.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/49e27fbeeacb8187db5127b4dcd3a53e/83770900327.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/09ocsl54bcld6tsq1uqu62st02/69060859613.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/99094617847.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/38554476594.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/nukit.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b487b1e2e---10542361236.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///gibowesamugubigukiliz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=lambretta+v200+owners+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_off0000c086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC086 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89D 10768 bytes
SHA-256: 39df53ccb4dc2596454e61f1ba106f934962f74a800b3d6282f5eb687151f971
font_02_sfnt_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 18920 bytes
SHA-256: 1ee01f89d01cd3cf8e53ee5a65cadac9a684b5a377d5d69ae11d6b7604a39c85

Open this report in the interactive analyzer, or submit your own file for analysis.