Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47bbd2236f6afbe…

MALICIOUS

PDF

85.5 KB Created: 2021-09-19 12:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 61384cff5a7ccf252e65c108311eb228 SHA-1: 15642382f7e4d2a85e1c226c59ab0a0ecadfa19c SHA-256: e47bbd2236f6afbe7c79344d7e00031f8fd38079610922ba1d4f911faf3de68a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of a link to a compromised WordPress upload storage further supports this. No scripts were extracted, limiting the analysis of direct execution vectors.

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 http://elfobchod.cz/foto/Image/file/geveluzosujegosofowope.pdf In PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/43041340119.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/gowobu.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210902_3C9A7670C757FF73.pdfIn PDF document text
    • http://aurora-c.jp/files/files/sozovozesopusumavadabatol.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/95524005645.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/4bdgl4h51ek6l1bmto45ncr611/pomanevorererojiw.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/buvetomalurebisi.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b73b114c19---58686271422.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/pawepuniza.pdfIn PDF document text
    • https://schmitz.cz/res/file/96047673329.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/siroviboluduzuvejerega.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/levaxoraxiwefefo.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/zedozurulomolizipabo.pdfIn PDF document text
    • http://skmsm.com/userData/board/file/44939692154.pdfIn PDF document text
    • http://palami.by/images/file/rawuwipinazatipeses.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/14821638817.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/64744089549.pdfIn PDF document text
    • http://kingsfci.com/userfiles/file/97330577365.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/1863419732.pdfIn PDF document text
    • http://sissonne.hu/editor_up/93472985094.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/35676458400.pdfIn PDF document text
    • http://kovospm.cz/fotky/file/naxovikut.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/tuzebapifalufo.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/68a28ed101368f740c55493288f4179e/midojonofabijaridefimun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=pc+games+play+on+androidPDF 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_off0000e8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C9 18016 bytes
SHA-256: b3c187181183a9b2d0ca226ad80907cb86afa2fbc7a644d7cd7cc6b4498f134d
font_01_sfnt_off000116f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0D 10872 bytes
SHA-256: 1f39c0fb0fbbd2119de0f3e6e25198adac16f22e756997746d0fc5ee084c7acc

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