Malicious PDF — malware analysis report

Static analysis result for SHA-256 0752609176806f7b…

MALICIOUS

PDF

91.8 KB Created: 2021-07-06 12:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2e0cbf8141dd75d40615c664d50f8fdd SHA-1: 562f3bcf49cfe29ec4d36d065013fcaf78467411 SHA-256: 0752609176806f7b63eec51566c3b5c0904acfb8b18e8ed1575ccdec3358533f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of embedded links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847ef4c3f05---44972809263.pdf In PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6a181c79c---lezokajajipopelomolo.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/3c27d9d746ec6808d022acfa5ca92778/52622502587.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/6eacbd6d9f65137e6d74b85095fa0228/lodekazejemolerigod.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bda6c556a1f---19465677727.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210504002738775.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/330f4459baaba8766695893e65f5eb55/bijojifogaxaraj.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/vigiw.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/54382562716.pdfIn PDF document text
    • https://genericdiabeticteststrips.com/userfiles/files/suledarifepuwutizan.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/3g2opibril0co3cmtnlm3gr9hq/65003001779.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608175c1bc8e4---22031689993.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/96905365380.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad1bc4ebb4---gazunotixenarukis.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021061921182773499.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xikemitexubulo.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7976f10083d428ccd08792b3806f53d0/kovozixebeboweti.pdfIn PDF document text
    • http://whippets-au.com/clients/7/7f/7f5032e15db821a993a8146895416847/File/73801278625.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/27399713425.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5794d5b014---barew.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c04d7ad5d65---19824879028.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/52a4289fc4f19bbd1dbcae113878e7e3/mevukamasesapasusutuwov.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/bc679a5ae18984b9589d02dce10c73e0/pegaged.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/luwugo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=inches+to+litersPDF 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_off0000ec0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0E 16168 bytes
SHA-256: 1cfb00680a8a18ef5d5af493cc5b57cfe410abeba37087ee2ecd799c98b61e68
font_01_sfnt_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 18260 bytes
SHA-256: 1291e4614a320c4dd33d437627a99927029483ab8d8c16731416e2bc6a439d91
font_02_sfnt_off00013188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13188 10116 bytes
SHA-256: 1c668d159692cdd0a0a93f155c67c3a09b360a57a2910c3fa9649344533e6ead
font_03_sfnt_off00014806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14806 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1