Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f050787380f82b…

MALICIOUS

PDF

76.8 KB Created: 2021-09-03 03:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d13ab8dc7724a2e47f046db0b33699ad SHA-1: a29b0b73ecad4fc81bfa96b2b65a29297891f972 SHA-256: f9f050787380f82b9b479a3fe0b507cf296d39c2ec58d1c8cb8a783b8af6bac3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of link farms on disposable hosting further supports a malicious intent.

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 http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086af4966a2d---61573507255.pdf In PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/1ada7f5b49b09459ea2e8bee7b0ce96e/toxuzi.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/82696807500.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/kulajug.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/dea5ae9233a872eb1388987b34432c44/82530658174.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/88019845673.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4859e62bfd---13716421806.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/lusujaxovuvaxefikopud.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b959afd86ca---kovizukobovufarazuwig.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/bb009602ea897d5b53501bc4051084d3/18257085587.pdfIn PDF document text
    • http://hp-cnc.de/uploads/files/gubamugeta.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/78528595410.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/b9b4aab8e97d58239034f68233608c78/rusadetusifuzawulate.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/oc92h0n9s3f4t9mmhrnjd5oknf/rabipefafazane.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8dd43b8d3---jukoluvekumibugejo.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160de02bf86c9d---53846369867.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160d529c0a6bf8---silepivupevedaj.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/fcac84cc3babd371936292b72c803532/ralagexex.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210704034220_nybob9.pdfIn PDF document text
    • https://truckforceone.eu/upload/editor/file/88443306906.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/9776909133.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/duzajenumeban.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/78416773553.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///3241155102.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=focus+group+discussion+thesis+pdfPDF 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_off0000c7a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A5 10768 bytes
SHA-256: 7bc87669de8757dc3a48541ca551fd4915fd9b0caa546e441daafaee5b7c0dbe
font_01_sfnt_off0000e01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 17884 bytes
SHA-256: 18c5fed4fe35afc639293389ebcd10eded375569c7bfc4faa95c1829d7f753cc
font_02_sfnt_off00010dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1