Malicious PDF — malware analysis report

Static analysis result for SHA-256 324ff464a3deee2f…

MALICIOUS

PDF

97.3 KB Created: 2021-06-28 16:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f0ec755bda940fdeb74ea30e37f19d39 SHA-1: d05b12c42fb281a567ce72cf669129602d19aa90 SHA-256: 324ff464a3deee2fce0bd0019925831696d7d3838426e0bca8ea6529fa2b40e0
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised CMS upload storage, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs point to various PDF files, likely serving as lures or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f3dd68236---giwuzorixenevitap.pdf In PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/3881e5cc1a946aa6034d978a915a22db/gogewubuk.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/pefowobiganupomaruwuxitis.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0c4c0d829---vugigama.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/50193582698.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/nidusejakokoj.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608014afb160d---lonetugamuzigimozej.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/lagaxibumaliruraj.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/luwizatewuxika.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9072260996---lokididurofilapef.pdfIn PDF document text
    • http://thedreams.cz/files/jogelezikupa.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bb59bdda6---8879029959.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083ce8f3034f---judeforureraw.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bed155729d---sujiverekegiburutogixab.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/2gulfotrho0hib3d7e0nub4mp1/foxogaduwi.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/tolifezijigabara.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/8aakr6c2f9flps279ath3hse6v/95646525088.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/vizizesixotupufozuzova.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160756fdd84cd1---juzibagitikusobubikisuvo.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/garovi.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/gewemedefeduvaxigulap.pdfIn PDF document text
    • http://gtshotel.it/images/file/19455706727.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7383ad752f44057c60fc0ba0d84699d9/vewefusirefu.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606feeba9d7c9---vojagugonuvijekazositife.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210622194135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=medical+leave+letter+from+doctorPDF 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_off00011b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7C 17152 bytes
SHA-256: 9c2c8b415ea59241fcd874cf583add6315681ab826e4e17d3586df98dccd1618
font_01_sfnt_off0001484c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1484C 10424 bytes
SHA-256: 8f5cdced16e0f6360b1546aab204d3a7dee36b9bdfb7fa8371e047615200a536
font_02_sfnt_off00015ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1