Malicious PDF — malware analysis report

Static analysis result for SHA-256 1989369732f9588f…

MALICIOUS

PDF

81.0 KB Created: 2021-08-30 03:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 422105ff600c6c11b77a2a5f54cb9e7c SHA-1: bd3cb45c0529af727cf8cac5c0eb754d983881cf SHA-256: 1989369732f9588f6895d4962b1648340cdc152741e32583c7e5f1cf10eff679
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised WordPress upload directories, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The file's structure as a link farm is a common tactic for directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f22586912e4---78008675787.pdf In PDF document text
    • http://teechart.com/uploads/images/files/69996035667.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/gu6p2m1513s2s8l4u5v5svick2/suxoba.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/709599235610fb1802dca4.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/pabegig.pdfIn PDF document text
    • http://innotack.com/userfiles/files/bewurerefuxowezamimek.pdfIn PDF document text
    • http://emannsltd.com/userfiles/73028846322.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/dgk0qvfc1pu3u8r0omh4jpaecp/wudepupelabusolite.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/mln8iu81ul689co4adt7grs639/vosesosejuzusotopijir.pdfIn PDF document text
    • http://rc-modeller.se/images/file///wululimarimaleva.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c95d8d604f0---vubuziweresebe.pdfIn PDF document text
    • http://asfalon.com/__files/file/29306487100.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3bb3932a6---12913663560.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/pulalawozulinapewo.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/c5566488a81b6a85f4f784a50ee7a49b/jeramupegusi.pdfIn PDF document text
    • https://aashianarealty.com/file/98616990223.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/b8n451c9tkja2edki8id6gv2ks/nipepumifibitubi.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/zurutedenogubefofupesajik.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eed488a3f1---diborofujaxalumunoberusu.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bafaka.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/32970237547.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/tobewejilimem.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/40754157602.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a693c6ad1a---fadumukuvowajajajadodirij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=compound+mixture+differencePDF 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_off0000d8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DC 10640 bytes
SHA-256: 4bbdd6b610035b73e352f18a85c9ea77875637a3b6e44c105130709c9a0693c6
font_01_sfnt_off0000f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001093f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 17448 bytes
SHA-256: 44239fdc3b18b81ece8fbcb88ef8bc27352888026b5deec40f048c6535f1c670