Malicious PDF — malware analysis report

Static analysis result for SHA-256 be230e206926a83b…

MALICIOUS

PDF

68.4 KB Created: 2021-06-11 02:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea375f542a08cba7eb7ff65eed326a0d SHA-1: 13f9e5b06ea6d69eff8fc2a6043e2f4ff3234028 SHA-256: be230e206926a83bdd25f2da8a30ef847f52ad1c4bf8df52e07bbfe67796d508
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to compromised websites, likely intended to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, with the document body referencing a game download to mask its true purpose. No scripts were extracted, but the numerous external links are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=pokemon+light+platinum+latest+version
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/b27tso6eh7183b7us8pr7tuet0/tuwuko.pdf
    • https://noddy.nu/images/file/ruminazes.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/44f5aefe4b1f3b45617265b92e6db052/xalakizuga.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/da947ff02b096e93e4be8344eb2ba1b0/59870950320.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/pr7da8qemnne5qs7sneu12ane3/42751743598.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607505decd250---36869665033.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/f10ab38612723286f0bb76770e604259/93535209200.pdf
    • http://iltorg.ru/upload/file/wadogavutasaxunasuzewed.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e481d7111---jaduk.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e72f33c009---tilasigipofurimiwas.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dd937b5dd---52297534276.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/lmojg8dpp70u7so8t3q0i6rmmt/lawamirurefewadofiwomevi.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47ca5a3b7c---gonosowatukenupezutex.pdf
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/ramexika.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/a00bcbf395bb3f96ca9e81e454285105/tufekefonepijosovowojuvub.pdf
    • https://lawyerupsmart.com/tempimg/file/weditagizabojiruke.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/27fo63c0okopqel8qasun7rnbr/70456221495.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/dazolimapuvekudugemupi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc2.bin
f0d0257036fb57755daf226e41368fed13e9e6b32251ab3f0a2c24cbf3a281f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC2 5360 bytes
font_01_sfnt_off0000dedb.bin
348e9dca2acb6b12850dd981da543d5d62c743f4839649cc7119503044e1f392
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDB 10604 bytes