Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d0f7d40dd1b075…

MALICIOUS

PDF

89.2 KB Created: 2021-09-01 15:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1a47e971eb1219a745e0d2ee9969c2f7 SHA-1: cb378baa1e7152e1464eb6bffcfc9a0f776dbf70 SHA-256: c6d0f7d40dd1b0755c480c86a9ca47008864bd16596f67bd7b150e7fe12c59e3
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document functions as a link farm, likely to distribute malware or conduct phishing attacks. The presence of 'utm_term' in one of the URLs further supports the idea of a campaign aimed at driving traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://huntic.ru/uplcv?utm_term=strike+the+blood+ep+1+eng+sub PDF link annotation
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e20607171---14640740567.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/27920109100.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/99241032914.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/37706505316.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/4001pdjdtqd642lkvok2ll4615/dofujebesibijaratosuda.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/12273792834.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/nibufusegerukegubobawuna.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/lemanagifuvo.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090e41ba0210---33485017133.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/17338693103.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/5cb93ae47fdc97f1e59ea51a85847bea/78835830064.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/duxexetezesug.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/23190242555.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/jekexinejedim.pdfIn PDF document text
    • http://biosite.ru/images/news/file/96100524658.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/vixodebelopozanawirozej.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/660f08a044801cec590d85b7c12ca4ce/xewaduzebejajubibalopamo.pdfIn PDF document text
    • https://arredamentigiacobbe.it/file/97136482980.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79ced93c83---jupalawad.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b0531a50aad---35079362476.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/vepuvipuxomilofefevor.pdfIn PDF document text
    • 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_off0000ebbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBD 22300 bytes
SHA-256: 7130625c853d8f26cfcbac0118eabb0dbd1e0abc19b80aefc7de4dd823a9c785
font_01_sfnt_off000125dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF4 10968 bytes
SHA-256: afce39768a9e5f97b6e47ce6fb19481eed3244889b66e002887efaa7fec9924d

Open this report in the interactive analyzer, or submit your own file for analysis.