Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3344bfe0fb23a8…

MALICIOUS

PDF

83.8 KB Created: 2021-09-01 00:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bf4b2357f298825fd667b5364a562467 SHA-1: ee9229244d797ab166fe46dc68f711e4dc7e6e98 SHA-256: ea3344bfe0fb23a8490eda276ac0601ca18c4de748bce3cec69e0de0f75fb4ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to trick users into downloading further malicious content.

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://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16086343384f4f---92750647460.pdf In PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a841b6c64d0---watukasameselutakezen.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/1f59fdd01b98d8fce45020d0ee032e91/dugofonapolubifabuk.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/72999698089.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3ee8c209a---65392149282.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/398c38455b114edf7b36fd78bffa225d/77339793310.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/dagowuvozofo.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/zagomumeluvakaxura.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758f09a05c0---vozixifobinewadivujekoxe.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/polukuxokujekimigubikudel.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/60817368371.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4d5c7799b1---73722728735.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/20855420886.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/rezarixonivine.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/pogorawekopojasonutaxo.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/cba53gn84v96jj5u2919lksstj/70640411154.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/dizujewoxelaloparadavikeg.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/23001489065.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1a9e5d64---89110162875.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/49909448001.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/wodaluloz.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/bb085175d2ab546a4776d4b80b0392dd/95565489735.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/35577575239.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/vizuxibijojukiwim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=wilting+plants+after+transplantPDF 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_off0000e240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 10408 bytes
SHA-256: 2bd679502222f17a7a029cc881f2b68d671042dcb4d63ef0b40e69fdbb5c1970
font_01_sfnt_off0000f9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 18976 bytes
SHA-256: cddceff32ad4c69e4a0cf84723ee7ee4aedfb790d58e8644bf8d434e8e16383e
font_02_sfnt_off000129b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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