Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0589397630a5d8…

MALICIOUS

PDF

79.4 KB Created: 2021-09-07 13:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1022e1dc262fd4d1e932340a98c90e97 SHA-1: 11beaa751f0db374141bb3165065822a25180b1a SHA-256: 5e0589397630a5d86e8c92b3a8c18bdb522dd5332663a659e32c361a85f919a0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous compromised websites and disposable hosting domains, often with 'utm_term' parameters suggesting a phishing or SEO-based lure for software licenses. The embedded URLs and link farm structure indicate an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e620d23ec---bimikuvuriduxopogituxifo.pdf In PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/42655030875.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/ledoxemekupof.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/55095104014.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/xoxix.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/nibaduw.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/wemuwexowabogeraxetox.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/80804918661.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/e568c305fe1945e799f4d2f0b10ef533/43946176003.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/dekabuluxisisukidebomel.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/pemuvanufutekawanibakubu.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920b3346388---tavidofotizubozovugiragug.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f487999d2e---wofodotazoximexadoz.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5b52ba460---vimekaka.pdfIn PDF document text
    • https://nenanhduong.vn/Upload/files/moxatadoti.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/gewemifemafopajalukigixaz.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/41671462720.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/050d4b178365d9219743119a78dad702/xinolakijug.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/4365408083.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ovanes.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/817a3e4f97e7090f2e0963c4d9dcd308/37495091167.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26f388a402---66079610501.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/safaxajudokuvaparoxime.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/23995849061.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=pdf+xchange+viewer+license+keyPDF 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_off0000c973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC973 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE185 20244 bytes
SHA-256: ee02e827a580454919686960db52abe5a4f89cf0b860c0873e7a24d67a9b8308
font_02_sfnt_off000116a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A1 11000 bytes
SHA-256: a96b731b75109924d3266f780cb2efe4a0816ce7199764a46ac282aa57216b2c

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