Malicious PDF — malware analysis report

Static analysis result for SHA-256 020785fd9ce92866…

MALICIOUS

PDF

68.8 KB Created: 2021-09-28 13:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 470197908d60d76527aaf5ddf54f4206 SHA-1: a6b40515a1a1f876a2484aae2b52ffcce5321bc6 SHA-256: 020785fd9ce92866021d36ea6e5b6a4c6979a4f8d53c3d0a180e1c8207751655
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, directing users to multiple compromised websites, likely to host phishing pages or further malware. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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 http://gocreate.termall.pl/upload/fck/file/fesisu.pdf In PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/30865603611.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8e30de2c1---fesulerejobuvorojegodape.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161491390ad075---bivilorowixituzudadaburin.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/12243628494.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/febakina.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16131aa60bcc98---62979668217.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/d6e622049e4c889b7d5d37f147079d8d/zobugagokeboniluruzofajev.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/12556410160.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/8856135134.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/dalobevopikalakuregofapi.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/riwunu.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/gidevud.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-6/20210906190607181207.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161368333e51c9---vorixegumu.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/41283238298.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/53117953460.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/i4m3kgcbr4lhsltl429dpsgae5/18049423132.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/livufirimemulepu.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/mizazelup.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-10/20210910004636948186.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/86021592588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=bible+read+online+recovery+versionPDF 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_off0000ae19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC630 10640 bytes
SHA-256: 0ca497c58939ffe0c15e3ee105a5ccaff35fa11bd5ecfb2b88b5690bd040cb8d
font_02_sfnt_off0000dea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA1 15344 bytes
SHA-256: 70cb138fbc6265a135910aa2fe637be6f922bb8c94a60d56c1ab970b6fb11f9f