Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee15d8cc2c7cf2f6…

MALICIOUS

PDF

81.9 KB Created: 2021-09-08 14:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a9cb8fbfe2dca0791351929b506ad60f SHA-1: b3de6e56ec9ff6a40a700b1e66a060db1b7be192 SHA-256: ee15d8cc2c7cf2f63c7a819fe7b321d9e6101a77eb1cc4e1426556a6156ef284
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to domains identified as disposable or compromised. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm on potentially untrusted hosting supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://fototipia.hu/files/files/18009154063.pdf In PDF document text
    • https://mgogs.com/mgfiles/file/mamowigufol.pdfIn PDF document text
    • http://retailcop.ca/files/petevi.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/rikuvuxasogotomu.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/rinesevilavifurakijaduxod.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109062351359685.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/57864910405.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/0de5e2ec8ab8b39460ce6911d2eaa989/61608998312.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/8649633605.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/20823259215.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/95810273536.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/61387b5a2eb5c.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/wemutak.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58711524977.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386f3cec3a2---96027940768.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/51254959734.pdfIn PDF document text
    • http://tfforming.ru/d/files/10148340712.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210905125639.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/55389795969.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/69462552890.pdfIn PDF document text
    • http://njbeihang.com/uploadfile/file///2021090804464324.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/10943567241.pdfIn PDF document text
    • https://clove7.com/userfiles/file/75420903248.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/mopitugewasifefogukeli.pdfIn PDF document text
    • http://dejede.com/userfiles/file/80699330393.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132b2d5f2cb7---67380829654.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=itron+fc200+manualPDF 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_off0000d9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B1 19140 bytes
SHA-256: c353a602bdf83c2cd5cdc7f1c061442312544cf727e90afd4890cb82535952d3
font_01_sfnt_off00010a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12257 10396 bytes
SHA-256: ee21ccd0d01f354871f294e9427ae574a8fa9520d92ba033cf2186c19c9a2dbe

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