Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc51ad4136f3c9e7…

MALICIOUS

PDF

68.0 KB Created: 2021-03-03 10:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9451d8e1f26b5ecd9cdb9fcced8b4b8c SHA-1: 095e17ae9a33c5f328370f9fff4b7c6be5487e61 SHA-256: cc51ad4136f3c9e7efb8c57d781957c036163c05404128dcc2f90f801966061b
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating it is likely a phishing or malware distribution attempt. It contains numerous links to disposable hosting domains, disguised as search results for various terms, including 'stanley shop vac instruction manual'. The presence of these links suggests the primary goal is to redirect users to malicious websites. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent to trick users into navigating to untrusted external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dafemum.ru/123?utm_term=stanley+shop+vac+instruction+manual In PDF document text
    • http://wisitens.online/battlefield_4_cheats_pcukrys.pdfIn PDF document text
    • http://tonerinkstore.com/belebowarobapevihq52i.pdfIn PDF document text
    • http://onlinetyz.xyz/ayo_and_teo_dance_videos_hdvidzm9926.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378641/normal_5fe0b97fbc39e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454163/normal_602fdd17505bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_60397b0484463.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464702/normal_5fd0901966bee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417530/normal_5fdac55071b71.pdfIn PDF document text
    • http://healthytrands.com/schema_installation_electrique_maison_neuver5yby.pdfIn PDF document text
    • http://spainsale.pro/4_times_table_activity_sheetsrhfou.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_602199f5995d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419001/normal_5fcedaf3dd023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_5fdc8745749b3.pdfIn PDF document text
    • http://adv-workshop.site/denotugus0zuvw.pdfIn PDF document text
    • http://circleshtang.xyz/58317354822ez03r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5ffadd5a43f1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nokiva/consul-_template_docker_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/bedroom_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/38313734786.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/24156528408.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_off0000cad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD0 5440 bytes
SHA-256: ac81af92667288aba8ada41049c1ba530f493fed89c2e26045636bb1ea26ca68
font_01_sfnt_off0000dd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD34 10928 bytes
SHA-256: 61a68728722dbd3187b03cab15f706cc4b3bf9b4bd104d15cc0fde20e45b220f

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