Malicious PDF — malware analysis report

Static analysis result for SHA-256 905aac2f69059f06…

MALICIOUS

PDF

87.3 KB Created: 2021-06-12 23:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 80b482357a00497a6368a89b20b2118a SHA-1: bdec09b33cdea55a986f9e920eb5a7121a673674 SHA-256: 905aac2f69059f06ae4915b6e617502b74458a7f3bbdffa94e3bbded267996b9
256 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a lure to copy/paste into a command line and a critical alert for requesting recovery secrets. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF. The embedded URLs and link farm heuristics point to a phishing or credential harvesting attempt, potentially leading to further payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://allytemp.ru/uplcv?utm_term=xcom+2+console+cheats PDF link annotation
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f965fa25ad207395ed71d4a0eea70929/xoraberibod.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/17018465377.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/82234478448.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/eau7c6fkfgvh12rcgnq5qa8fp1/masibepomufili.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160920e24330f4---bogewe.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/gileno.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/da68s0ghuttccnrc5o2t4dgb45/52929954449.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/xewugowegebopuwiru.pdfIn PDF document text
    • https://yuss.it/file/15674875347.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160915af27af8b---semuri.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/zonem.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/b4d802877d1ae946a21ff09f4ea12316/52517720395.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DF 5052 bytes
SHA-256: e182889861dd321e40d594382dcd254f520a0ce3217a1f53279f58839ff336a9
font_01_sfnt_off000129eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EB 11432 bytes
SHA-256: 74f409a4f9badbf7dcf7abe47b0d93125a145d9b468d42c026112feef67a037f

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