Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7205c30e9e2314d…

MALICIOUS

PDF

75.5 KB Created: 2021-10-01 07:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5803256fcae7fba066f53164bf43550e SHA-1: 1c4b9d7c1d259a1bf0ac56081da7b5bbd4285603 SHA-256: a7205c30e9e2314d923770c1ae6f85724a39a64668b430fa350087c828ec065f
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as a phishing trojan. It contains numerous links, many pointing to compromised or disposable hosting, suggesting an attempt to lure users to malicious sites. The presence of a link farm and the overall detection as a phishing trojan indicate a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81430203902.pdf In PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/13963981989.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/61102769235.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/62b818c0f4cc8fe3e28e1395a31fe6bd/zirefiluwuvetenifarusu.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/53390663215.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148c4a14c429---todopomokesemosada.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/20618527269.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/40906352306.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a831a20570c178c9c084257a6979b405/lizofakoraruro.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/83974794689.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210929115321_1435397124.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b9e108804---15106888487.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/minafewatodu.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/xebazowepap.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/ditatuduvukekof.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210917034459_2b0ggg.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/fevedamemomisez.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/gumibaviwojoxokefobaxav.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/ruraliv.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/mikoxaralamemaja.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/pavekijiwikupoginu.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/85874456362.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/dexovakojizitovuwimuw.pdfIn PDF document text
    • http://unleadedcoffee.cz/soubory/nupetogefe.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/lexudusakefobotarezaxeza.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/zibalasotefujofil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=best+free+phone+spy+appsPDF 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_off0000bf28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF28 18492 bytes
SHA-256: 0791826c54468f71f66c25bcb95c4bb56c65c38bfa7d64ee48da6f9e0bbfd380
font_01_sfnt_off0000eede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F5 10484 bytes
SHA-256: d53b46af3bcbb7d7d537b86e729518a33163112248f65757c9566887f80cd758