Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea0fd43e552e8b0…

MALICIOUS

PDF

73.7 KB Created: 2021-09-28 00:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bf7cfd1fd7028f96779cd0d91045cff2 SHA-1: f2fee7c2cfce6ba516a4f58a4391b4ee4d12b5b6 SHA-256: cea0fd43e552e8b0d89aa68112e45e2137a7a40e93397bf99d70d11cbde6df5f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://huntic.ru/uplcv?utm_term=pubg+new+state+ios PDF link annotation
    • http://thegoshow.net/userfiles/file/46774928304.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/79463930510.pdfIn PDF document text
    • http://tw-jia.com/uploads/files/202109131220263550.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/gokikobage.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/52883799509.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/58299899198.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/c84f53d5ac96f7e102f28f265fba5637/sizogeperiwane.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/022231031805.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/lesineneto.pdfIn PDF document text
    • http://metapolar.hu/tmp/87349382150.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/molajulupol.pdfIn PDF document text
    • http://jnejendomsdrift.dk/userfiles/file/21656608763.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/gesikubofejunu.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/gudujewebozozedawet.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/labejinerinamakul.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-09-27/f5e7e8f1b86957178a0a79958fd4a1b7.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/kufikatifagipa.pdfIn PDF document text
    • https://cosmetic.dilen.top/upload/files/13283413515.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/66647652503.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/91703194891.pdfIn PDF document text
    • https://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/37502137335.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16142aa2ca3a4c---dovugamixogugibobe.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/rigim.pdfIn PDF document text
    • https://istruttorecinofilo.it/userfiles/file/33559187810.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_off0000b6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6EC 19964 bytes
SHA-256: 4115ff5314223a173e4ac50e5c94c4456b3c03b26425153cca2cc6d06051d472
font_01_sfnt_off0000e9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CA 10464 bytes
SHA-256: c22c8da7a09ffc98359a08ec615cb1282793ac794cbaa4f017e140aaaecdb286

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