Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e2447ccbed6142…

MALICIOUS

PDF

81.4 KB Created: 2021-09-01 21:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b6587470d6f9c760fd79bf5e80577d9b SHA-1: 90b032691dfebf830d1a49c4c512f095ff228d0a SHA-256: 07e2447ccbed6142210532a6bde839c00cd75a1e7ee75bdb03ae8cc740a69d7f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised websites. These links are likely intended to lure users into phishing scams or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160af97edc7395---43674643432.pdf In PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/44282878000.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/wanesuborimopabesapo.pdfIn PDF document text
    • http://healthywithhart.com/res/file/93208645000.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/natibenilatovaxopa.pdfIn PDF document text
    • https://limsurempat.com/contents//files/pabogojubumozupusala.pdfIn PDF document text
    • http://linker-apps.com/files/vifad.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dd16e05ba---70203724299.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/958514822fd8df94bf02d95e82bc8704/77261085934.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210701164756332555809.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/bgson3knlv664h55cd13jvfasr/70972321467.pdfIn PDF document text
    • http://santabruna.cl/upload/file/89565076447.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/46932657114.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/xifumivajukazoloradupu.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/e43794f6868c811612fcb1edde5e6dab/fuxugakitipufeza.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080ea1e01a06---59851323504.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1612ab6b279359---62673805820.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/sttvf55jgg2ordt8nilq182uod/22368821447.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/h829gfrkdcn9d6f7mvkhhagq5d/wopagexazemekilibi.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/titeziv.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711382b64c7---tuzolagiboxifi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608979194ae98---33397316077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=christian+twin+baby+boy+namesPDF 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_off0000dace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACE 17400 bytes
SHA-256: c3d9ceeaa837b94bdf7cd6eeeda48b82c7c6d60917e9d92cfb4d576323b814fe
font_01_sfnt_off00010821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12038 10700 bytes
SHA-256: 2c0d1b9ec95478587b4d6693e31f4f2d7cd5c352af790351a6e2ccb19a212e2f

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