Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9bc0a68320bfdd…

MALICIOUS

PDF

99.4 KB Created: 2021-07-01 20:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 87e13c6cf7bd25690d6268a57dc9e937 SHA-1: 9ea11b884e1585053156ec47e8dde83c10df1c69 SHA-256: 3c9bc0a68320bfdd0905f7b2dd3cd26ee5e1be7189c95ebccc957a193dacb25f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a strong likelihood of malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • 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.
  • 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 http://mysistermyfriendministries.org/clients/85776/File/58612343006.pdf In PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a859a6abb---31660017672.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/xegisi.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/boweribanezomegij.pdfIn PDF document text
    • http://beiks.info/public/file/65205416665.pdfIn PDF document text
    • http://babyschultz.com/clients/72285/File/93069165391.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/ep4lpd72pg9dppd2hfgd5aagb3/lekuleliredeku.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073fa8766054---wekevebosifelubikiga.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/32305317938.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/74b41bd064d3ff99c66cb0fa1d9d86e1/pefazuzolami.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/ladofamujunodim.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920eab507cf---getabotekukuxewogijawiti.pdfIn PDF document text
    • http://nnrhc.com/clients/9/98/980d61ede38c9a35fe3396fb65651545/File/faluz.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb98ddf70c---barasoluluxozitivef.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/witiwomifabonuwix.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///20049770949.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/43287cda472b00f27793794a48d8b03c/12558617291.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/qkasq84413c4bog3bejaavjat9/gatikijarav.pdfIn PDF document text
    • http://klhl.com/userfiles/file/83683042660.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/menobuxifu.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac72a7d13b2---72073652142.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082239993c6d---52764803899.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4b16a02e040cb49344b6257f960ec7ef/netifodete.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/femujusemufisedi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=metalwork+technology+and+practice+pdfPDF link annotation
    • 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_off0001210e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210E 11016 bytes
SHA-256: dc82fbac392510ec07e410e89472373604516991e6559c764d5f2c3621100b52
font_01_sfnt_off00013a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001528c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1528C 17488 bytes
SHA-256: 1d62fdda13c4ded548d3e4586ae08a1ee34ec60195d9d4331c75ba71b06df0bb

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