Malicious PDF — malware analysis report

Static analysis result for SHA-256 1956981f1a29a227…

MALICIOUS

PDF

76.2 KB Created: 2021-07-20 05:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 242769b7bea4e8e9ff030ed30591b028 SHA-1: 23deb9223eeec7a11bfd4c0a7388f2be4288e6af SHA-256: 1956981f1a29a227923f845dfae6f18cb4dfe97dc840241ee2967c5c2c496cb4
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7764

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
  • 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
  • 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 http://am-assets.com/aom/magnolia/userfiles/file/xiwife.pdf In PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/7hg4q9ngn69dp52v9ltceo5vi3/51929806646.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/98473984284.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/i0dg26c09id4dtv4g1f9c45ol5/difufufoloj.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f1b6e366b84---20082400776.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd6709de71---woguwiwetoju.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/damepil.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/4902ab985eb29b950e8a087d04d02d5f/jaxoleduvonemeg.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/47890502181.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a6fbdf002---53806776750.pdfIn PDF document text
    • http://www.klccpa.com/userfiles/file/In PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/q6j6f4jj16ldesoevmk0t0q1vn/77529292254.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/f49d556a773973399feb1552b2503cab/tomovesijojedo.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/97827132648.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca40bc6312f---43343997811.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/d784e8161630d575ce81648d1430550b/bibamim.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/zuvox.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/0303b3bb6c62d63e6dbd1245a59c492c/fuvosijigoxodixebovisiso.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/46238804382.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/beroni.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210629_E13DCB9B7611E882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=can+you+unblock+a+phonePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB96 10488 bytes
SHA-256: 7a0f9fc57c91dff2bf68c74832a3db5bfcdbdc2b2beae1dc6d8999f78ab761dc

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