Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39464be9bad162c…

MALICIOUS

PDF

73.5 KB Created: 2021-09-07 14:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1af8817b464e15f3d22fa2f145956a74 SHA-1: 8467ae249c0608f782edf9e63ba29f3f99f394a6 SHA-256: b39464be9bad162cfff07cbc14b823c5bdafc0ff5fce933239b39f2cb7c19a7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised WordPress upload directories, suggesting a link farm designed to obscure the ultimate destination. While no scripts were directly extracted, the presence of these links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/b5d9c9ef369ae3fefd6dc9874f3a640f/fagaba.pdf In PDF document text
    • http://sangjeom.com/userfiles/file///90963289839.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e81b71ff34---91725914767.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/gavuziteza.pdfIn PDF document text
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/nalelumonomabaximotosegod.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607850de1b08e---11265280745.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/girat.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d635cd2eb4---56851672217.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/29116444623.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/58132524537.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/revinanokarodukewajepali.pdfIn PDF document text
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/zofik.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/70339221129.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/716ff54c929df6ff9c90bf6f140ba1fe/67507600488.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/6407165299.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/kamifubixurifupifevetupim.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac95ce9f663---33274835940.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/5ca62f7d23dad89019ddd807d7081062/50464342403.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2173aa6f1---21336363288.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/zavinoxipefuraratedi.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/pevetoluxolimu.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608361fa5d047---buputiredovuzelug.pdfIn PDF document text
    • http://budka39.ru/files/4778693258.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ff313bf74---11880314513.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160791cbdbbbfb---26113581741.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=abrazadera+para+unicanal+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_off0000bc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC84 17396 bytes
SHA-256: 3824ed4c5ed553a340589d36b1c873703c4d45f1dd38bc62433beee14698375b
font_01_sfnt_off0000e890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE890 10508 bytes
SHA-256: a2f5b7e083dad0a483e1ac202b48e6e5dbdacbf6eded22bb6c87feb82df7a32e
font_02_sfnt_off00010059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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