Malicious PDF — malware analysis report

Static analysis result for SHA-256 47186890687fd0b5…

MALICIOUS

PDF

83.8 KB Created: 2021-07-02 17:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3f987d47e7af7d4fd5950090c14fc0fc SHA-1: 3ba9f7b6ce2e675b6b2bce48f35c60fa56834f5d SHA-256: 47186890687fd0b5cb0cb2240b612dcb661626b8b61090993c6b8b059d63a7c4
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, a common technique for distributing malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure suggests it may leverage embedded JavaScript for redirection or exploitation, hence the T1059.007 technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://soudurelauziere.com/upload/editor/file/41154586511.pdf In PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/i3m509j0063rqlrpfa3aqofpim/joduforunanakiburobepegup.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/afdb9ad3a863e95236da3895926674d0/nisoxonodotogasesowibula.pdfIn PDF document text
    • https://thepainter.asia/upload/files/34603107912.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/85842337176.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160884dfab6c7a---1552248043.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160d506ab4fcf9---29848943184.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/kurabadipojuwe.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccaa70e5825---fabikofopoguxixijosenixom.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/fc58a32d27aa0bb86e558067a0f1c445/benurexofavotemazaxodu.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8362267a9f---29826723056.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/pusukupaxogenu.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/e6do1c5a05lkim8lgbgt008p0u/36211893579.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/cbnghv5hi6u4b2nnbs743970br/mewogemosefuzakiwutev.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/9e93f5c5f1ff4cbe50887c092fc37739/85455013924.pdfIn PDF document text
    • https://puppometalli.eu/file/42638708597.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/t9vv8d025ie16e2n6l6dv3gj3s/nejurigubofadumilefugo.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/zaguxejozakubunekamefu.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f7d978b1a---bigatetuwujowere.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9a296f3b0---rukezidak.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/bazomijipez.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/35717278491.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/buzawomubi.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/tuxasibadumekegoxa.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/pipisejogagawawetemita.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876dd798bb3---56629148012.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=physical+science+atomic+structure+worksheet+answersPDF 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_off0000e625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE625 16288 bytes
SHA-256: 03ef5351852f3426299848f58ef5b1fe398c85adf58d3226bef9f8250ff3f98e
font_01_sfnt_off00011034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11034 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001284b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284B 10888 bytes
SHA-256: 495101eabea038eda42b1284894fc9da5fff91a1e69ab6cfb4e0cd4536f2d6da