Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc8f25d44793607…

MALICIOUS

PDF

82.2 KB Created: 2021-09-11 02:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 700efc3fcf4705fd4d48c3eecd9ab83a SHA-1: 859d104ce9ac9e6b1740e2f25fd8855f9d23027e SHA-256: ccc8f25d4479360710c689cae34426594ca4f3cf4d089baa3105218d2ba10ee8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it may leverage embedded JavaScript or exploit vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://travellightnepal.com/userfiles/file/93445461397.pdf In PDF document text
    • http://travelspace.pl/userfiles/file/jivimufumaba.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/73380045256.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89394966494.pdfIn PDF document text
    • http://svenskafik.se/uploads/fckeditor/file/lekawuder.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/ranitorimalegitije.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/zekabolasapemidivivuron.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/65571595094.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e40a3cab4---4388464754.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/wagipowepapaxeluduvupo.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/rejamavedekuvajotaxirusen.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/75858307041.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/25348307348.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/pipaxigevel.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/4437045130.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/46500858415.pdfIn PDF document text
    • http://vegman-kzn.com/ckfinder/userfiles/files/76518635444.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/17953575213.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xoweno.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/zafatikejikizelule.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/39548382682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=iphone+5s+price+in+bangladesh+64gbPDF 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_off0000d6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C5 11168 bytes
SHA-256: 138db118d7a0d7fd3cfb6f7cc102695968f1508550e0339f96182ea7f44221a0
font_01_sfnt_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 18992 bytes
SHA-256: b0a8be8923cc2f490fb3ba21a4b04c0f123a852ae8c7ead2698869725871332d
font_02_sfnt_off000122ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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