Malicious PDF — malware analysis report

Static analysis result for SHA-256 8963d84768e522d4…

MALICIOUS

PDF

279.9 KB Created: 2021-06-29 08:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 25dbec71260a4d24ca6981e3ffc8907c SHA-1: afa8736d0d8436c33c1d17de4baf8f34c9d77946 SHA-256: 8963d84768e522d46debccc0694e796f2fae22b361bc1d25232dec80e2a65402
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by multiple engines, including ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting it's part of a phishing campaign or a distribution mechanism for further malware. The presence of embedded URLs and the use of compromised CMS uploads indicate an attempt to lure users to malicious content or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://philabc.ru/uplcv?utm_term=star+wars+knights+of+the+old+republic+manual PDF link annotation
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/jthd3053b9d6nrg9n37c3llbhf/jesugos.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/ff19959f4100d44541a7c1a08ef8cece/77377340014.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/69f3af7254f9e8103b66278f0f081a19/63793748131.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/e4e96d3a71aaa9e4a204d4a84e575dc0/61709101966.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160baf9ef3d37f---lazivogovibobivedelaxukes.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/mixedediv.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160750351cf8ab---57041205880.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/e721eb67e5f69decb419e821e0a6928d/50137996129.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/nemunufefexivubomuzet.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/tikok.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b762db2a19---23665227019.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/f80ee58bf1909bafd6881bae013dae89/90852524123.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/95df40583b3c4ecee9a158c7e2f206e1/noniviwidoduri.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/rikekofane.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/1f2td8i5e70gg95penqfht4l1b/71848528902.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607966fc892c8---35858505552.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/vuzebobegolexepokiror.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/4ld3dl7kbfl4o1o8fh65692gnq/mikesemeges.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/68c51112d8ba07d1c5a886d064941294/xoxuzezoguxiv.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021060402292873499.pdfIn PDF document text
    • http://rafaelokazakov.com/file/duvisomufosobosoxalemafe.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbc527866e---27820171886.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/3f79352b9639c7d638f85421037ea65d/jovutabaxazakufiw.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_off0003f07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F07F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00040891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40891 16928 bytes
SHA-256: 8c5c242244f33cab9d85b2ac0d6369f48c7c838556c4fcbd999cbe75346a518d
font_02_sfnt_off0004345b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4345B 11560 bytes
SHA-256: 1c14a496c7bf3ba57c5baad72ebee8c4540116f8cfbc2368df6de3d2a07df33f

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