Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbc5938d4cb30b0…

MALICIOUS

PDF

444.9 KB Created: 2021-07-02 11:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b655df5e2ce9adf7a27c5499c418931c SHA-1: 49533a01a6c2ebe232d860f46ea21cd49b06caa4 SHA-256: 7bbc5938d4cb30b0b5b6d34c6919315a05155678024adc03f8de2ea86d618d9b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious intent, including links to compromised CMS uploads and a direct IP address. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous suspicious URLs suggests an attempt to redirect the user to malicious content, likely a phishing page or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7593

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/790cb6534e4ebb0111aa170dcf16a7e4/fufubaros.pdf In PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5fe38fc11---goxemuragusetululib.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/202162735466957.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/dojepag.pdfPDF link annotation
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089bc1c82c69---15102236564.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb7629ef41---digunefumirapetimari.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/91514741096.pdfIn PDF document text
    • http://sns.hu/_user/file/lofuxenarupigigudineziwob.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/fevini.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0437824563---rorebene.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c391ea3b05---88999103228.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/72907386010.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/9ecdb3a5f2fd186eb7c453766cf1e47b/dapopogasuzewavodo.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/112107313574.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5c41d730a---nazuvoxebekopaxevujugawu.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/91254a593288329924a929a3f85eab64/koporafivodakudipuki.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb702b6b01---tawejazasovuduvid.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/6kfr720p4ec5do6mptj1dep075/welavovi.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/45906727024.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/f5ebf03ro1hqtsrlefsa1u8i03/fadowikugug.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/65854157747.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/it2e8vdvk3a0p2c40vjedpmfqn/6713737325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=berserk+and+the+band+of+the+hawk+ps+vitaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00062c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C46 28048 bytes
SHA-256: cda6d5631a668d2f62d409f8b97f344f16f449f3e168f5ee5108ccafb9df1baa
font_01_sfnt_off0006714e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6714E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00068965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68965 10984 bytes
SHA-256: bbc6c444fd59ca495fc6357d5575519b2642074673a0805403043a61dbf8470f
font_03_sfnt_off0006a2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2B1 20440 bytes
SHA-256: 69fc9628c3ca578599502f76dd4572fb7625de2c8894d8d8277a35a8f5c4cca5

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