Malicious PDF — malware analysis report

Static analysis result for SHA-256 e486562ae9a11686…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 00:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb8b2f2170aec4177b68d213915421e5 SHA-1: c15008dfffa0502b789ea8dc281770ec720b422c SHA-256: e486562ae9a11686ff7b4a3c81e90a194a7de8d57fd4700b9add704cbaa70a36
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress upload directories and other disposable hosting sites, indicating a link farm designed to distribute malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly suggests maliciousness. The primary attack pattern involves luring users to these external sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785931ca7e5---purivalakavomivoxe.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16085bda95902a---29234051771.pdf
    • https://raiporjai.com/piceditor/file/9134332613.pdf
    • https://aviseco.ro/userfiles/file/81483233895.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b022551537---48696403371.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6ba71cbd7---luzap.pdf
    • http://baaningdoi.com/file_media/file_image/file/merumizivozupazebixabi.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ba256367b---32245363544.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b05ea395ad---37881652757.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c573b99a947---bedinaka.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609c143fd4e82---suwedazovamivigevu.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb70fb89c8---46673507872.pdf
    • http://mjacz.cz/soubory/files/gamej.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/fevvl42m4gsf2sm1ab6u43e8j5/sazezabanivuwesobezo.pdf
    • http://www.europesolidaire.eu/userfiles/files/fapafevekozitomonupena.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160815466aba59---73173249615.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c685a12b94e---25368352437.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/qm2fkmkbcc2ahngfvsqm07boek/92808717521.pdf
    • https://bakwanudang.com/contents//files/zegalejomupovif.pdf
    • https://vanphongphampmc.com/upload/files/pajori.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/ab0322c97b5410e0eaa9df2240625cc8/84915169357.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160bab3f3ac275---1384210992.pdf
    • https://educationindiajournal.org/ckfinder/userfiles/files/42136881389.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b72b09a8a---20664429244.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=straight+conductor+magnetic+field
    • 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_off0000ebd5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 16792 bytes
font_01_sfnt_off000103e7.bin
abf275bdd049fc8785412823018a48ae5af98469c712d0321639cb14621cd5c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x103E7 18076 bytes
font_02_sfnt_off000133d9.bin
4ee4f1d441e7e44a22eca5585a51215cb7d212096b3c39b992a501994e3a5d08
pdf-font-stream PDF embedded font (sfnt) at offset 0x133D9 10932 bytes