Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0dd138c4f170893…

MALICIOUS

PDF

218.0 KB Created: 2021-07-01 23:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 997a6f06cec5b32819f8b108091e3ca2 SHA-1: 3f055e914d02e4af1024fb1ceb9e49423736a283 SHA-256: a0dd138c4f170893c40811d01989fd5d28c1c649df3d382dacef53bff4ce4208
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of compromised CMS upload links and the overall detection profile point towards a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9772

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fc77e4cbe---73213971471.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082c66852ce1---78049007861.pdf
    • https://cafe-malaysia.com/contents/file/4328811685.pdf
    • http://micronforgacsolo.hu/UserFiles/file/68850016911.pdf
    • https://bwawarszawa.pl/upload/file/zubemekugigerutitekipobop.pdf
    • https://parklanehotel.asia/userfiles/file/rijomaxab.pdf
    • https://coffeetuanvang.com/Images_upload/files/94324848755.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be009169b29---41525853878.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/ja0ihbg84t8rndl0lktetkcipl/wexotosuxabajub.pdf
    • https://hitpoint.tw/userfiles/file/56077266414.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/35ad3cbb72a3afd88df8592f7cd6d647/turebiv.pdf
    • http://atiksigorta.com/files/77389991532.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/82df06b5badaee2d06b0223fe3210d71/99924965945.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a11916d1611---pakivonatejovokazebiroleg.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0b663c09f---fadubogexamanef.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/2ospf6m5qbq1sld4t6956na2th/59682599183.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2644d3628---72891942511.pdf
    • http://live-lessons.net/lcj/web/uploads/assets/file/sukivixebazijavelama.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/141947467760aad1451f441.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607145b10466c---59209117184.pdf
    • https://vibangnhadat.com/uploads/files/papipabagunokedel.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16086939252fd2---63898940464.pdf
    • http://kameleonhastanc.hu/files/file/vidugijosepiwazojido.pdf
    • http://allprintusa.com/admin/images/file/sepajakajo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=all+your+love+tab
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002fd5b.bin
dc23590f48fb02bd4b123e820b1181f8f8fb83d8f9a052f31434149389a40a02
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD5B 18024 bytes
font_01_sfnt_off00032bc6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x32BC6 16792 bytes
font_02_sfnt_off000343dd.bin
c94b104cdbeb70375b18a197f1e4df34108459a66461ec5967192f5fc7acc73d
pdf-font-stream PDF embedded font (sfnt) at offset 0x343DD 10136 bytes