Malicious PDF — malware analysis report

Static analysis result for SHA-256 06033e5d25ee0eff…

MALICIOUS

PDF

86.0 KB Created: 2021-09-14 21:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 497daf73c74e29a1c1b2750748c21f46 SHA-1: a40e7ca52e10143cea89e4e605159bb3139634b1 SHA-256: 06033e5d25ee0effa0e4a7f5593c3cef47f33409c22ea3dce738925fb55a822c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, strongly suggests a phishing or malware distribution attempt. The ML classifier also assigned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://synerhu.ru/uplcv?utm_term=genshin+impact+1+billion+primogem PDF link annotation
    • http://iglozawiercie.pl/zdjecia/file/33090088369.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/26035735553.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130543a442e0---21249169909.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/gowajabuzawonoxoz.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/kuluzofeximaz.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/soxuvabokapuz.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613be4475b6c4---ladomevitofa.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d885a164d8---91002457051.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021962048324223.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c265d48165---73075797986.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/donod.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/livakejuma.pdfIn PDF document text
    • http://falcon.dk/sites/default/files/webfm/jagirejowesuxe.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/tukexigevaketet.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d98421107---gudepuralojebapop.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/80584623033.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139a222b056e---kefofomizuvejukolegas.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/powawukarokaxakodaw.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/64245619515.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/xebeperejunov.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/19415659459.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/megexikaxeb.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_off0000e63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63B 19516 bytes
SHA-256: 69ec3dccdf726ab22846ea4f0bb8dc6cc32b9e32ae3e23665311e09987842cba
font_01_sfnt_off00011944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11944 11052 bytes
SHA-256: c7e7e4eaa6e4aa1a4d80b96c357245a9d422d8f7d285bb4f76d3160087968754
font_02_sfnt_off000132ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1