Malicious PDF — malware analysis report

Static analysis result for SHA-256 f997440b49f177fe…

MALICIOUS

PDF

81.8 KB Created: 2021-09-05 02:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 098277eb32c901506fe2dce4f141a596 SHA-1: d40503ca7da12f3e51c15a2b3b7848a4a7e136dc SHA-256: f997440b49f177fea1e499bf4675f1279edd299b17dbf08feba71f871ea63657
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings imply it's designed to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://chemicalengineers.ie/images/xizewifazoxojaxivakej.pdf In PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fde733350d0---68969241254.pdfIn PDF document text
    • https://steammining.com/userfiles/file/81496457247.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/mopanaputupukofux.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/pagoriwenul.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/91728191753.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/93599456935.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/37626825158.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/69708761274.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/52943615289.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab617c3db5---girukabopelevawika.pdfIn PDF document text
    • http://amdind.com/userfiles/file/wopijuwobanu.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/sikurapetekapiruzowajat.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/98924037263.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/kisogixizesaxavikenofojis.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/2efa7289ed403bd68374f4a5d7167ff9/59079797411.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a21ca18600---dugurete.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/raxur.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/sulilovekoveg.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/90782315194.pdfIn PDF document text
    • http://chipmax.in/chipmax/ckfinder/userfiles/files/65042798746.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/59423379998.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/503571139.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160dce62a870d7---51413900732.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=le+socialisme+utopique+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_off0000daa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 17944 bytes
SHA-256: c04ad25c8e04c2ea17e3c418711d606fe1907e6571623024deecda59b55dfd6c
font_02_sfnt_off00011f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F54 10780 bytes
SHA-256: 7e9190e1cf6919376c5279b27f837e5e03e1ae035157be196c8cf4bb97e338c0

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