Malicious PDF — malware analysis report

Static analysis result for SHA-256 2876bed6a6f2e5c1…

MALICIOUS

PDF

73.5 KB Created: 2021-09-17 04:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e7eefd9e03fd396ab4f0f519b2132ebc SHA-1: 66c39a89e6fe888352590a06cbf9507a74197009 SHA-256: 2876bed6a6f2e5c161ec03cb890aa8ab5e6efb2fb535346b5009a77d0ca3d472
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The primary lure appears to be a fake game download, indicated by the 'utm_term' parameter in one of the URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=gta+five+game+download+for+android PDF link annotation
    • http://mutitar.com/user_img/files/79350472065.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/zonumos.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/1919682785.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4d3b7454d7290435afdfe79546993407/30047737117.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd62c865b9---vibimetizutifijevanedik.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16132ffe8ec81f---rowewimamolupagizevun.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16142f1c3a5296---80164959403.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0fa26d2af---64705250933.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e3a7d3450---jesoboxixatakuvafurumi.pdfIn PDF document text
    • http://17njl.com/userfiles/files/273127260.pdfIn PDF document text
    • http://tianfonmm.com/d/files/karixusazabex.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///97543899156.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc8e9e5a4f---80684692921.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/00f48c8fbe23704c3316c6575496f222/kozojujot.pdfIn PDF document text
    • http://ewtch.com/upload/files/rifapo.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/wanuleke.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/41871457355.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/e0721ba217cd71be6ce9a8e28605876a/73816645306.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/sonetatag.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10366033505.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/gejup.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/63326804795.pdfIn PDF document text
    • http://hzxf.com/images/upload/File/fojopegekedatelitel.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/mabijolekapisexilisanuge.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/70416825902.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_off0000bec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D6 15948 bytes
SHA-256: eddd2cca4bd219e41c3cf7bcf433d8474c12f14cdb71c05b632f24884c9c0e24
font_02_sfnt_off0000ffbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBF 10720 bytes
SHA-256: d775bf41f6cf5b0f2859f94772d44efd7bad87e4fbf7957f14e870344a48a0b9

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