Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60695b79c6ae4c7…

MALICIOUS

PDF

87.9 KB Created: 2021-02-04 01:43:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ff0e295ac6045e8bddf38fbe5f939479 SHA-1: 7b126882c602052355837bb10ee6474216efb530 SHA-256: b60695b79c6ae4c785d698e4266d82b450c2a6756836a065b94080a3a43d0d6d
284 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a lure for secret recovery. The document body, though heavily obfuscated, suggests a context related to cloud formation or database clusters, which could be a pretext for the recovery scam. The presence of embedded URLs and the ML classifier's high confidence further support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.
  • 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://yafferge.ru/wb?keyword=aurora%20db%20cluster%20cloudformation In PDF document text
    • http://usersdeviceprotectionservice.site/30348448280gotnp.pdfIn PDF document text
    • http://girlsbeach.space/20884900913m3ygn.pdfIn PDF document text
    • http://reduslim-italiaofficial.site/giponumaluvupazigifofakicv9r7.pdfIn PDF document text
    • http://salebox.shop/tigejodabixilot6uw7f.pdfIn PDF document text
    • http://gotedez.22web.org/authorization_for_background_check_form_for_tenant.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_5fe103e70b532.pdfIn PDF document text
    • http://ttttrrrr.space/jeneputotijadvcask.pdfIn PDF document text
    • http://trellos.fun/buried_gianto4cpk.pdfIn PDF document text
    • http://ita-talia.fun/science_et_vie_photographiekcmow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443619/normal_60082bf08a805.pdfIn PDF document text
    • http://gradstroy.su/97204180671zhmwm.pdfIn PDF document text
    • http://ing-cliente.com/19016461853kx9kq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dubejatusir.epizy.com/sokorewu.pdfIn PDF document text
    • http://dunupepemogakiw.epizy.com/zikepere.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/whatsapp_video_tik_tok.pdfIn PDF document text
    • http://runapapaxezupow.rf.gd/19879588736.pdfIn PDF document text
    • http://sanikivatuma.rf.gd/sorojejiwimevug.pdfIn 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_off0001184e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184E 5296 bytes
SHA-256: 9b457ec6424c2fcc51556567e3139e89ebc46c1bf38c73bd925051f13e84e17f
font_01_sfnt_off00012a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A39 12184 bytes
SHA-256: e09c1ab41a9d874b73f268134ba3545cc4deaa81189cecc63263301d4d47d707