Malicious PDF — malware analysis report

Static analysis result for SHA-256 c722d930c2d707e3…

MALICIOUS

PDF

72.0 KB Created: 2021-09-19 15:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 150494822ee185c6b81e6c8bcec4694d SHA-1: bfc4723278d8adbfc7b4289bc2be878689ad83f1 SHA-256: c722d930c2d707e3a583b91b8391170e3d2468f755b09ac51efff882e57dfe56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress upload directories. These links likely serve as a link farm to redirect users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=7+years+roblox+id PDF link annotation
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146454661c34---88220999587.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/remasapesesujajovex.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-15-14-11-53-68.pdfIn PDF document text
    • https://matharu.ae/userfiles/file/70053660912.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/rudutuwirawom.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/davut.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/25496420746.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/gutetufuzuxon.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/sinebugabuwavinawe.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/19357831702.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613535088d46a---60726483441.pdfIn PDF document text
    • https://1000families.eu/userfiles/file/9231960459.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/9019688235.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c0da9cd6235f1ac188b1e936e8ed1e41/9287244297.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/zibepofofedolupitamerateb.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613e82c2eeb44---kalovofimefanumewavi.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_off0000b713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB713 17164 bytes
SHA-256: b326720b8b4872fe112aa42783803f8ebb34f0e52b10b45bde91220014f4548a
font_01_sfnt_off0000e3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC14 10348 bytes
SHA-256: 03320b1dba6e79b0149fd7e12a56e0a76a2f4dd5ca0bbbc5171322545635ad71

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