Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2196fd9ddb3d441…

MALICIOUS

PDF

73.5 KB Created: 2021-09-12 06:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ece963f27cd8cd6e9abdbd2ccc383ac6 SHA-1: 23cf3570c78783b986467030ba90d95e9789c17b SHA-256: d2196fd9ddb3d4414425f218a563a9cbd2287d62cdfb8149224aaebc77c2196a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it functions as a link farm, pointing to multiple domains, some of which are hosted on compromised CMS uploads or disposable hosting. These links likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://smartech.lv/sites/smartech/uploads/documents/files/63508873903.pdf In PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131952fa0527---95346196096.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139f6cdcb16d---rasujajisezup.pdfIn PDF document text
    • https://superchills.com/userfiles/file/sevatutagefiginego.pdfIn PDF document text
    • http://rrarental.org/upload/file/45937351218.pdfIn PDF document text
    • http://abc-tel.ru/data/File/92752571056.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/mivajulopazasarasomi.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/7236170932.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/xuzat.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/13470612933.pdfIn PDF document text
    • http://shanghaicruiseparty.com/uploads/file/35323161367.pdfIn PDF document text
    • http://195exim.com/datas/files/94176413355.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/34571179125.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/giwaropuwitujibusitasa.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/kumozaluwomaremudosifo.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/xidaruginap.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137e7ffddcc7---36735891774.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/xaxasebuzakebuwixepanixow.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/85837732647.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/mevibowegu.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/97083685763.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/62048087344.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/92048638816.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=blazor+ui+designPDF 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_off0000b642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB642 10536 bytes
SHA-256: e30840b5bbb4f723da5e5434b8de9e08b09e93b9cc96380d6bc780db4a117716
font_01_sfnt_off0000ce25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE25 19220 bytes
SHA-256: 577d84a5a37620ffc7113087715ed509fd69e5778b11ec4b669797634d6cd649
font_02_sfnt_off00010033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10033 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1