Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d30798639f7ac70…

MALICIOUS

PDF

69.4 KB Created: 2021-09-28 07:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6212c285a5dd9e01f07c3bad83aeee9c SHA-1: 4f1141ce416994e883557249768f3734db762b21 SHA-256: 9d30798639f7ac70058f31c460aa5a08b5ef41e1ae308d51aa44661f59f2cd33
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The document's structure, being image-heavy with minimal text, further supports its use as a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pixomot.ru/uplcv?utm_term=mms+messages+not+downloading+galaxy+s8 PDF link annotation
    • http://realtor-madrid.com/uploades/fckeditorfile/tevomalitavaledikev.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/68134870525.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/bodofodivawimixezotarewol.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/4153832192.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/zinoxepufukupevek.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614149c7a9a6c---77977652794.pdfIn PDF document text
    • https://rais.bg/uploads/file/5311722551.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad9cd3de34---bidejalugiweforiwe.pdfIn PDF document text
    • https://kaparatt.com/images/File/fufufigimesebusixuni.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/zifozukokavolutorajiz.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/kakiparuwo.pdfIn PDF document text
    • https://pediatricpotentialsnj.com/PP/PPpng/files/detabowunukugitopisa.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/552sm6naf6vdo8mt15ef3ule9a/75744481832.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/84272152862.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/69831439952.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/93979968573.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/26705945228.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/99207256090.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/33618388188.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/wagenetanaletutevopinuj.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/161508e5305007---20778028064.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/18699330978.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/xilasuxuruginix.pdfIn 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://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_off0000b2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACB 14204 bytes
SHA-256: 5e08f33fb203600e4865a6f37390ae9b96540eacb1e9dbb561fe37b08054eb0a
font_02_sfnt_off0000ee3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3A 10996 bytes
SHA-256: 6cd0dc5c29693a424d7944450b2ef126a1c53f6fca4988de9f8eec73300e85ba

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