Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6c47a6bc0a568d…

MALICIOUS

PDF

47.7 KB Created: 2020-03-16 06:32:38 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-12-25
MD5: 7f2964f791e92fbbdf95b1443b4b050c SHA-1: 8c83b28f78753ac94f469c1d0e8412e74ba83507 SHA-256: 6d6c47a6bc0a568d86cc8e1a3a0f47c7d269b8a2df33862b05f762bb97038036
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, consistent with callback phishing or tech-support scams. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely to trick users into fraudulent interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://forteacademyofmusic.com/uploads/1/3/0/7/130775710/130775710.html#best+number+tracker+app PDF link annotation
    • http://thehouseofpsych.net/uploads/1/3/0/6/130604820/0d96ccba2e9.pdfIn PDF document text
    • http://c00pconsulting.com/uploads/1/3/0/6/130603715/vamafawezafi.pdfIn PDF document text
    • http://globalcareservices.net/uploads/1/3/0/8/130814124/2058124.pdfIn PDF document text
    • http://braddystudios.com/uploads/1/3/0/4/130483109/jetidetigozitera.pdfIn PDF document text
    • http://airstreamflyingcloud19cb.net/uploads/1/3/0/2/130270843/ba30d1d3d.pdfIn PDF document text
    • http://annim.net/uploads/1/3/0/6/130639486/migubalopu.pdfIn PDF document text
    • http://smykkemageren.com/uploads/1/3/0/7/130775705/3834490.pdfIn PDF document text
    • http://guardiantraining.co.uk/uploads/1/3/0/9/130969511/3553718.pdfIn PDF document text
    • http://lsusbillaportfolio.com/uploads/1/3/0/6/130620240/lifuxon_wukuxi.pdfIn PDF document text
    • http://mvnhs.org/uploads/1/3/0/6/130621700/4841632.pdfIn PDF document text
    • http://egyptcasting.com/uploads/1/3/0/7/130776331/bapanewifexafogurom.pdfIn PDF document text
    • http://www.ok-resources.com/uploads/1/3/0/6/130604804/gidawenu.pdfIn PDF document text
    • http://tailorbrooks.com/uploads/1/3/0/5/130551033/niten.pdfIn PDF document text
    • http://microscopedesign.com/uploads/1/3/0/2/130271054/vumogojeliv-wanof-lesojaduk-nisoferexapir.pdfIn PDF document text
    • http://crucialchristian.org/uploads/1/3/0/2/130288926/8376673.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9199 8460 bytes
SHA-256: f5febcd983b6027ebae789f2760447d03549823b152d3856bc7173af15884733

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