Malicious PDF — malware analysis report

Static analysis result for SHA-256 489c27b365412ca8…

MALICIOUS

PDF

99.1 KB Created: 2021-06-20 08:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0b1a76ae0534f8c05a7e914a7ac3a8d4 SHA-1: ebea7681a725740c134a811d77b268e0bf591fe1 SHA-256: 489c27b365412ca8f37f2a8464292b0af28fb4685ae2d78514db170b25436f8c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'ClickFix' heuristic suggests the document attempts to trick users into executing commands, a common social engineering tactic. The presence of numerous links pointing to compromised CMS upload directories and disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/jug1s2u8np7n0pooskcuokoj71/43633769092.pdf In PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa5981dd7c---tukiralib.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/guropagamasesejezife.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/bsk4hvnqma0566slm4ocmkeknk/70509475250.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef224bec38---25488439337.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16078673a94332---94577202052.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/kakakopikulas.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/j9j9vpfpc9sv3f5obnhvl6kqha/sudod.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/3654b91fbcb192cbc52a61a7b137aea7/21017762099.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/toxupofefusoteb.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/f6b3462b78696f94c872acd881643019/selevizonumefepitokosi.pdfIn PDF document text
    • http://burchiellati.com./file_fck/file/pisug.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/10850869054.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/xojetuwemi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=best+resolution+for+low+end+pc+csgoPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13804 5252 bytes
SHA-256: afe2cfee9ea0aea59c581bf268fe26ba05f855518d8c386605c8b8c6c98ef022
font_01_sfnt_off00014a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A06 2924 bytes
SHA-256: 7230dd5627736ebd494d5ecd09f6d85803b94061ad15bedb7bfe3c8caf191d4d
font_02_sfnt_off000155fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155FE 12448 bytes
SHA-256: 0be43ad9c4da7bed5fcdc6bf3c288104a696bf5633e1ac2e087b507e31d57ae5

Open this report in the interactive analyzer, or submit your own file for analysis.