Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbf5f80e2597486…

MALICIOUS

PDF

85.6 KB Created: 2021-09-05 17:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eee17f841b0901f50a1b4ab88d533d96 SHA-1: 1c5f7db21b35206ed4ce1281b402540aab92c3c2 SHA-256: fdbf5f80e25974865432ee063b23aa2ec0fb329522d3ad096cd23eddba8d404f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to host and distribute malicious content. The presence of a download button lure further supports the phishing or scamming nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • 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.
  • 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://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311f1189d79---kusozifinimujap.pdf In PDF document text
    • http://holidayinntorino.com/userfiles/files/41832983470.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d6d2ce0e5---92616309139.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/kumefek.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/sjmqe914d94kkedsgrvnqv3d8l/48929252316.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/0d7cf05908673fc32568ee491d741efc/kuravinasimigokarolukodo.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd45bf147b5---42441655154.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/1a5beffc8c2419e68420c80ee65f5808/22026941576.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160751b3a20121---wotapusuferevuko.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/runinelunemogobirerorej.pdfIn PDF document text
    • https://panelshock.com/userfiles/file/rejikil.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4966566e8---tuvasosebodagefomi.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/lefawogaliba.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/e2ejanetaapdkefh7mn0v91opj/kagugadesakeli.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afec21db091---fawufutulu.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/d1bc4c40c9b6f5a945814814ce68b2da/zoroxubivuzesusidalo.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/wovemivofakesusavuwosed.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/tufasonuxofalu.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/tudakufe.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/6ee0vqbr12mgfb17i3jpg130tg/foloburupoled.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/96020957486.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/4914150819.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/logororozezigepuzebek.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/fufimeveripipejed.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fd9b15519d3---79285411390.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1d2a4fd1b---75774161907.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=nitro+convertisseur+pdf+to+excelPDF 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_off0000e6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 10696 bytes
SHA-256: d44451dc42b9fe8564982f74882f45e2be1e2d100f4af49c97113e734a41afea
font_01_sfnt_off0000ff88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF88 19140 bytes
SHA-256: e9ec1b59573a077286f1b33baefbe40c23e4ce5b412f906c62c629fb4d5fa40c
font_02_sfnt_off000130ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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