Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05d4025fbcb8a69…

MALICIOUS

PDF

94.3 KB Created: 2021-09-24 01:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0ae419399563b5e4c6a87c3a4c9428cc SHA-1: a202c33c8b0f4ca45b257106f12d42dbc1496fa7 SHA-256: e05d4025fbcb8a6946c8fc8166c1de84fe2d4bcde43c6534074668f15887faf5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://catamma.ru/uplcv?utm_term=peter+rabbit+2+putlockers PDF link annotation
    • https://equantumconsulting.com/files/files/xebozosa.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/zibarofedepedosifid.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/63784138493.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/1613431905.pdfIn PDF document text
    • http://gcoekmr.org/cukashmir/User_Files/imagefile/pewudo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613243ecd10c2---72854525780.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/lapisavojufaloxuputa.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/18041867404.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/4196434631.pdfIn PDF document text
    • https://mattress-leader.com/media/17531720480.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/duduzededul.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/80976261524.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/gusipamizoj.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/tuwokugeparujesogexiropa.pdfIn PDF document text
    • http://avvolodin.ru/upload/file/zijurufedoduroxagev.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/wagujajiridekafejozipup.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/33781811808.pdfIn PDF document text
    • https://camphacement.vn/upload/files/vuguxetimoviwe.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145a05ed2e08---ruwemasutisaxel.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161375ff9960b6---18989621769.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021091518304348.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/wizamenidenigumeradog.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/72554632594.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/p7lvd3i1eg5sb1nspf6o5gh05g/lofugosex.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/zekidijixinub.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_off00010743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10743 19644 bytes
SHA-256: 8199d609d44ab4920bda6b958d0fbaa909c6ecd6b29ffeede976899cae605b2c
font_01_sfnt_off00013b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B07 10716 bytes
SHA-256: 6823b78ac77a222c966ee345f5200f7bbbf1f61408e8f8d8e0752c36515bf6e9
font_02_sfnt_off0001539e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1539E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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