Malicious PDF — malware analysis report

Static analysis result for SHA-256 6186200632b6adab…

MALICIOUS

PDF

94.4 KB Created: 2021-06-13 12:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 348f3ae311eb13c708cef6d2348dca51 SHA-1: b72d22fbfa0e95fe4c5a27ffd06f4753a39e7623 SHA-256: 6186200632b6adabf1bcd83a7a0747467b070f92474e87fb5d7a1a66947b0420
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'black desert online sorceress build 2020', likely to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://laborke.ru/uplcv?utm_term=black+desert+online+sorceress+build+2020 PDF link annotation
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160778cb860be9---bogejaf.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/a3dapj4f0og51nbretob7etg7p/ferawut.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/27651589422.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/bf3974187bd576fcb3d688110da3a303/sasagek.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eaa9661802---55167188218.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/9b86fe134f1f5685f22f373d9f7e9f96/82140605449.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607018fb390f3---76849584184.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160776e13ec8e6---97778122592.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093c91e26724---98647680802.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/jegikazopamineposevuv.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/d9b7jtrduk4jafn3nk4i054djm/fupanapariribusafizopozav.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/52848946935.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/63412311909.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/9b9d4d00d6c15c4f7c45568d0d7569bb/duneku.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/67f74ee3b2fff952082b96c4d61b0cd3/63611148217.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/hof5chlv62udirq0511lagv660/58466226809.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off00011c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C57 5460 bytes
SHA-256: c55d9c9b4463b0751d9331dc4185fa080501bb3c6e7aa061dc1e52dcd50d5a80
font_01_sfnt_off00012eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEF 11140 bytes
SHA-256: b3da56eaad8ebfe28a7502fa37bfae39e917c863120c6082895b36680ace23a1
font_02_sfnt_off00015516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15516 17120 bytes
SHA-256: 33994d36f0e6e879d183a3d5d2fa22e5a87ce66b82271ce2c8710b4be651b3b8

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