Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04edc78f784a82e…

MALICIOUS

PDF

98.8 KB Created: 2021-06-27 22:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b2a0eee4dde7e392fb26b7c410f9b4ad SHA-1: 13ab0f12473bd3ddee3af5984b375302c05a81e2 SHA-256: b04edc78f784a82e99eb7cdbe25e757d147d20eeac8b8b4ed94e3bd4c37f1bc7
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. Multiple URLs point to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The document's structure and embedded links indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 6

  • 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 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://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607336bed949c---womugibeduvolalugupivaf.pdf In PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9da8651c97---kenokakokod.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/zewibawafox.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/rfjr4cc6dct07mml5t4cv3thpl/92118028386.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/niwepefa.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/7ilr10p3hr6k6ohgarh3d48l29/nazexekiliximalopusema.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/63149186415.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/298758701.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/78267747855.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/27434ad165aee4491ec12109b02f354b/92097970594.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7011e08dd---79523358384.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/c0kbuodbksihp7impp92k4mr2o/topilipuwosekamuvelaxaj.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/ad3db8ab20bc9e5c7718f77aff43af5a/63509322057.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/lirakaxa.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e0d3f1083725e7e5d851bb1d10e6a6bd/36404387171.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0952d6bece---79035262822.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/pijadepapugiziravijamep.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/sesilobal.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/7106221752.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a202d5989---56330664400.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9f3a73db2---73417030999.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/84823624773.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=compromise+in+tagalogPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10567 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D78 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_02_sfnt_off0001328c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328C 10624 bytes
SHA-256: 12fb916e39f971751ab38c544ca9ccf106eee054bf393f515eeceb107bc30725
font_03_sfnt_off00014acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ACF 19484 bytes
SHA-256: 4af356c00129bf917b073a10580ae18311d736708034c2f9954e01ecc6cdc876

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