Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf047495ba6b665…

MALICIOUS

PDF

90.8 KB Created: 2021-06-30 00:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03c939f045942bcf20ee5d8db19589f3 SHA-1: 2f2d8df37ff6dc861bd0d7c799d590fdb1443e62 SHA-256: 6cf047495ba6b6657aa4d27f377be103b4b6ad0fb9f5755590deb2a7ab5a0e8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised CMS upload storage and disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading or interacting with harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://netshopnepal.com/userfiles/file/jorekapukolikame.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70edd975e5---pigifijubexutefuliwo.pdf
    • http://thebellingerfamily.com/clients/0/05/05034faaa501c69409a7459485cba135/File/sovidulepa.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ee023a3ac---49829165822.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/509588e32455a01229fa30d56b16b7bd/jopuzosarumakokevefogezug.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767e87038ca---48237243123.pdf
    • http://crmloccitanecr.com/campannas/file/24064512087.pdf
    • https://rosewoodcity.org/nbloom/fckuploads/file/84218606569.pdf
    • http://hanboo.cn/Uploads/file/2021062221011670554.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/9839045446a9a916aa07a12d8a2e14fc/rogamopesilud.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805c9f8bf80---budokurifuzaruvowu.pdf
    • https://acgroupenterprise.com/userfiles/file/84965547111.pdf
    • http://alexandercdg.com/clients/36029/File/pasetuvasirej.pdf
    • http://somogroup.vn/ckfinder/userfiles/files/81257345106.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a30162aaf37---51290702787.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d085d693d---jagunenezejize.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/63bc18d136c24347d377351f88878d29/87859327137.pdf
    • https://soudurelauziere.com/upload/editor/file/zujapita.pdf
    • http://derkwoo.com/upload/editor/files/lozejejotunapokizix.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160830159e76c9---buduxufopujixuv.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/jifr8e37vu09lc28u9noi85h00/90488298726.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=find+the+maximum+rate+of+change+of+f+at+the+given+point
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd98.bin
d22bbb1d5297e9971dafea65604d8575443e179163536ad8a0ec6799c4867c42
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD98 17632 bytes
font_01_sfnt_off00012c22.bin
923d2372805c3772063e8863e3385720f7d3091d1949ca1bb65cd460c2cb8915
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C22 11100 bytes
font_02_sfnt_off000145a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145A4 16792 bytes