Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aaaeb642b9f6ff3…

MALICIOUS

PDF

78.6 KB Created: 2021-09-14 01:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9fecfe8d73fec35da5e6e1ba93bda011 SHA-1: 6c5afeb5f151e1adf1790d1c353beba03e537db8 SHA-256: 9aaaeb642b9f6ff370305e6de627b8721b135e986235a3a74f46dc3afefc8bb1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to download further malicious content. The presence of external URIs and link farm characteristics suggests a distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://drafthe.ru/uplcv?utm_term=how+to+add+printer+in+android PDF link annotation
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/pexivovumegejubirukufu.pdfIn PDF document text
    • https://akvaguru.hu/user/file/fugubeba.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/duwobuwotagoxojujis.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/vebesobakifiranor.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/21011375250.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/rewipusowekuba.pdfIn PDF document text
    • http://tianlanip.com/filespath/files/20210904105458.pdfIn PDF document text
    • http://yoron.net/up/files/29797479520.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/47106461340.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16130d596ef426---1983068285.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/52989186797.pdfIn PDF document text
    • http://evola.it/userfiles/files/2267532652.pdfIn PDF document text
    • http://nhadep30giay.com/uploads/image/files/kasurevexuzipifineves.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/vatazakasawunem.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/cc9792d4d8761c61a91d97fda0c30934/wefujobesom.pdfIn PDF document text
    • http://newworldss.com/uploads/file/tavutalujojewirob.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/85292679543.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/tokowezifupuraxujozepag.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/77138309279.pdfIn PDF document text
    • https://china-glass-mosaic.vegner.com/userfiles/files/20210907_155022.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/40864161326.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/tanisapeve.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_off0000d493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD493 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA5 16144 bytes
SHA-256: d10bdcbcc843b5b982dc0983f8a4aa951e24ef5e55cb706edd760e2f05ab2af2
font_02_sfnt_off0001160f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160F 10248 bytes
SHA-256: e84227541172c170b32feadf49da066a83ebb1a6dc4cf29d5e893d47ba276b02

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