Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e1de18c7b114c4…

MALICIOUS

PDF

73.9 KB Created: 2021-10-09 04:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4b3d68074c66d47021705d8af91f8d5c SHA-1: 6c1947297633903cde6e7c110165baf2d1dea51e SHA-256: b0e1de18c7b114c44964c74c650d1f30617b1b47304dcf1e4e7e4a1e088fbddc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains JavaScript actions and a significant number of embedded URLs, many pointing to compromised CMS uploads or disposable hosting, forming a link farm. This suggests the document is designed to lure users to external sites, likely for phishing or to download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=find+the+sum+and+product+of+the+roots+calculator PDF link annotation
    • http://mtsskzy.com/userfiles/file/bonuriwigejemilanovava.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/56093648829.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/92414439966.pdfIn PDF document text
    • http://lepixz.com/userfiles/file/mizexaxevigemo.pdfIn PDF document text
    • http://darslaska.org/ckfinder/userfiles/files/78174692776.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/rlbn95h96q6aei188d12obqlsm/gavujisezabexudamivab.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/vedulafogupato.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/94270568211.pdfIn PDF document text
    • http://esangsok.com/upfile/files/bibojesiwoko.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/77067851472.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/fcedffa37fe70497214d5f386a2cb88f/fegobekaguzudodap.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/69947366075.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/28632139415.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137db4f59879---95733005181.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/66706088902.pdfIn PDF document text
    • http://18554080.com/userfiles/file/99016265497.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/8c2e9e6fd35fd0104f9fea1c2036a201/demigaperotufubodopujo.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/zabumibepavenube.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/5462352915.pdfIn PDF document text
    • https://begili.com/uploads/image/files/90716751215.pdfIn PDF document text
    • http://carszana.com/image/upload/File/zelazonujunapumememunebed.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/57429864739.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/jifobix.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/28592463120.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a62b756e11.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_off0000baa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA4 10960 bytes
SHA-256: edeac52ca25f891716b8f062d2f6391830e2ed6d6e3207e193b64a42b4064b38
font_01_sfnt_off0000d3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CB 17728 bytes
SHA-256: eb16ff4bfccf7dd105214670c71dc39ce8769911eab47d207083296b879d8c85
font_02_sfnt_off000101c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1