Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffae2e6deb2f7ffd…

MALICIOUS

PDF

83.2 KB Created: 2021-09-05 05:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 903c44dbce67858730d007158172af45 SHA-1: 1d724a64696061fcab12c4fac06231550b86c7b0 SHA-256: ffae2e6deb2f7ffd8bbada9b4d2d517c6ab3dc677e128cdf06ec537109ff7f79
176 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to websites hosted on compromised CMS platforms, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/6enrmjmfplpeq06uf1klr46hoa/98728969032.pdf In PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/0d52158faf48de99d85294de15bac0df/11234201569.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/338731600.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d61d5f54d4f---40115609105.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/b9996462713e4a7c66a77473ba8abddb/demekokuwiwago.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/bojafilaxelaxolopevoj.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/49850151416.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/puxavu.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/68233258467.pdfIn PDF document text
    • http://poiskvod.ru/images/file/50446291284.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160942d41bda04---bowulirofidenusimurenil.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/likefazatesaketubigaduvew.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6e24de27a---91409448669.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/3142524112.pdfPDF link annotation
    • https://www.disbel.es/ckfinder/userfiles/files/dogobadeladadagetajemeguv.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/xomisoxenepusesugiz.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/54482678291.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b471444e98e---xoriba.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba198b4688d---bafuzoriku.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/4426874421.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4nbc548kfmtlbakh1si45k05q3/80097020840.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/50158358098.pdfIn PDF document text
    • http://medi-sen.com/files/files/27335224173.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=combine+two+pdf+ubuntuPDF 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_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 18080 bytes
SHA-256: b1cad821b63678869fb00a69f7c4ed118c1ae2ceb62a1cf7096877f90fd9180a
font_01_sfnt_off00010fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC2 10540 bytes
SHA-256: 933c4ba28e4ef3afa186448f8c62a42885a3d77c4e4337d5e609523c29d2cf0f
font_02_sfnt_off0001279c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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