Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24dc9264f96d591…

MALICIOUS

PDF

141.9 KB Created: 2021-07-22 20:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ca9fafeb65dcd792d8b0f98f0bfda089 SHA-1: c6a47552493fdb15894a8cfcafe8dcf971e8293f SHA-256: c24dc9264f96d59129cec10133daefe9f1899f0404c0e781736e6a89e6442b72
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 external websites, many of which are hosted on compromised CMS platforms. The presence of multiple unknown URLs suggests an attempt to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/m27vaub9nbc9hkd98k116eqh27/jikudadafob.pdf In PDF document text
    • http://madmojo.com/fckupload/file/poleginad.pdfIn PDF document text
    • https://eternalbliss.net/file/dasozevopakajigekesiwo.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f34b778f6---rawenimepukogiw.pdfIn PDF document text
    • https://festacontinua.it/public/file/kifoxuroleg.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1609f67e94d7a9---ladidelamepuranuboxam.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/f971507020e99af6e76d5ad4b981c5e1/86419735848.pdfIn PDF document text
    • http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/39945936420.pdfIn PDF document text
    • https://designclarf.it/file/vetetamif.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f3aa894146e---66975584738.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070ceba8a246---sogig.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/57967000900.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/61372497290.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/senanubadojifomexonuj.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1526cefbd7---76997619504.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/32245019159.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e6ca7281e---99579440327.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/496a3bc1f0c39abc1ad3da762fa146dc/fagevimupebefulafur.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/99397479828.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/levamewa.pdfIn PDF document text
    • https://ready4use.ru/uploads/files/liwiw.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/88699986581.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/36882159529.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/e9d6e0cdd1bfd3b962ab1c536cf8c4ef/88960397367.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210623054140.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=maus+sparknotes+chapter+1PDF 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_off0001c55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C55F 20596 bytes
SHA-256: 3345d2d79264f7e60953d2859ff6fe534a106b7054fe19edf3d386163d1278dd
font_01_sfnt_off0001f9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000211cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x211CF 10572 bytes
SHA-256: 911787e66073bb7eddf06aaf9aededb7e8be6f9e9863262cd0012856d8d3153c

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