Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c3202d290c938ed…

MALICIOUS

PDF

69.9 KB Created: 2021-09-28 06:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 67c2ed96c5e220117107d233f6fc67e8 SHA-1: bb478a190657b5a8ced36d09bcfc4f60706d26f5 SHA-256: 0c3202d290c938ed31d63d09c4d03b398a2345aa2faddeb5a3ff29e971fd2cdc
96 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to distribute malware. The presence of a URL with 'shadow+fight+2+cheats+apk' indicates a lure for potentially unwanted software or malware. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 5

  • 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://coretry.ru/uplcv?utm_term=shadow+fight+2+cheats+apk PDF link annotation
    • http://sayarbobinaj.com/file/82577991819.pdfIn PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/degowefevurikumafelamu.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307aa374076---15854053133.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/s7sgb0vbcajaeq2jdkh5j5ajg2/bejipubedoxipul.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/42470684749.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/1880301580613066ed909e5.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/25160470570.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/44753223356.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/95131060450.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/79328408277.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/74332581566.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/lutasapap.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/49368937683.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/1979974923.pdfIn PDF document text
    • http://syekp.gr/sites/default/files/file/37438776465.pdfIn PDF document text
    • https://cristalensi.com/public/File/89913728468.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/23789310158.pdfIn PDF document text
    • http://sun-tes.ru/files/file/dokulone.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161351c3264de3---71159504782.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/luvujizuxejekewek.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/b2igti6fkhvarne44vpln75l4p/vetum.pdfIn PDF document text
    • https://hiroyoung.com/data/files/38593601708.pdfIn PDF document text
    • http://umhouses.com/uploads/files/10048773470.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/femuzezenaxava.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/5316396511.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/91414639450.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_off0000b110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB110 11024 bytes
SHA-256: ba75876c11b456f7186d7c3c1d017089e16507c20b6c094a3e068ab31355522a
font_01_sfnt_off0000caca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACA 15492 bytes
SHA-256: 57f4334cad73bf39bc9ece5d89ef738d49067ffa0485ed2a3d8e2cd4d88a3263
font_02_sfnt_off0000f227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF227 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1