Malicious PDF — malware analysis report

Static analysis result for SHA-256 99cada976daff90b…

MALICIOUS

PDF

88.8 KB Created: 2021-07-06 03:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 46ea315d698e92cb002916e6bd451de3 SHA-1: 2b3a438b86af0fddf075b95341a42d96808d1f4d SHA-256: 99cada976daff90bb701c4fb5d7e9aee97763dbbf24179e8d23f315a33e9cd9e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. The primary attack pattern involves directing users to potentially malicious content via these embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d187187061---45636451211.pdf In PDF document text
    • https://finatwork.com/userfiles/file/novivopiwexazoderelogiz.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/xutomudozesefobakivatanib.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/mikazugewomukimuvixufixot.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/7234421703.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e3e442035---zojilotonajanosulokugolo.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/5730488298.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608e84a577a6d---75810713394.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/91156143927.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/titek.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/20142482105.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b46d0fac60a---lezogakuxumojojinopuwozul.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/fadidaloburinama.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/87383753932.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fc88eec10---kinunojasuvapufozum.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e37db3629e1---36473532458.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/49659259075.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/bosomebudexogololelegiros.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86a70d5ab5---dizulosatibobaliled.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607dd905538ac---46044224540.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5e357bd8a---66482569748.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/jojujotijivutemawazafebuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=prescott%27s+microbiology+10th+edition+free+pdf+downloadPDF link annotation
    • https://mediaget.com/userfiles/files/44881155980.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_off0000f357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 11616 bytes
SHA-256: 8a6cfbfe847cd249db1a0e6c481d43711be148122ad2a02a1ba1faf2dc6682cf
font_01_sfnt_off00010e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E85 17172 bytes
SHA-256: 4f63360744403f7c4d6d384ec9c7705dfb69e8275de9ea41e293e4ecb5a41339
font_02_sfnt_off00013b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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