Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee3f6b1cbdf6479…

MALICIOUS

PDF

73.7 KB Created: 2021-09-10 18:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 502377cbca418311b9a52f1556e36b49 SHA-1: 248648dd1e2e5426d9e2dcb4c1516ff15d4d3b43 SHA-256: bee3f6b1cbdf6479fa89add4bd19e6022e0ac91bc75ceee8da10a744d2f7ecc8
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on disposable infrastructure or compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://crysiq.ru/uplcv?utm_term=saw+6+putlocker PDF link annotation
    • https://skywaynepal.com/userfiles/file/wovawarudupovojifefofu.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/7f71jqp3787v3qvnmci80bc322/zozemalavavasirodunemoner.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/66850860818.pdfIn PDF document text
    • http://euroambulans.pl/userfiles/file/571594408.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090216014942.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/xubisemokanukifenakugaze.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/wavikufokure.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/sonowesifizibafef.pdfIn PDF document text
    • https://alident.centralcms.cloud/galeria/files/nejubugodelulufozonasixib.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/66074883110.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/161397fd2a0ad8---puparenitomewebapiniji.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/82832793383.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/gopafivemekegigufarojek.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/zopugudatoxiduliretejakuf.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/lanunarapubasepusoxenivo.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/rebukewowikukokurev.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613344335c056---sujadojusepinarotumomuf.pdfIn PDF document text
    • https://holycrosshealthcare.com/userfiles/files/tiwaruzebobedabojiter.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/pirebuturiw.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/97479846009.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/zanaregifixerimos.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/19287028233.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/47112412592.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355866c83e8---423518942.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_off0000ba5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA5C 10524 bytes
SHA-256: da4a79deee8c1c8b2753ae436ff24d3c850b9bf5f3a4ea487a94349987b7d76c
font_01_sfnt_off0000d29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29A 17664 bytes
SHA-256: bdb8e5ecbe8b7883da8a0d66054a9bfbe4a56e344ce7d2182e2d6a411dc1cbb4
font_02_sfnt_off00010127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10127 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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