Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f90cba28814312…

MALICIOUS

PDF

35.1 KB Created: 2020-04-14 11:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 77280636a2acac4e5c66c779c22f1d1f SHA-1: b7da0879bcb26494300bd070a569f8d06af10151 SHA-256: 70f90cba28814312ef720b4097e96d3ed1f4ba87de923b084731241fe45d1b35
96 Risk Score

Malware Insights

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

This PDF document contains numerous links to external PDF files, suggesting a link farm or redirection mechanism. The primary link points to a "sales aptitude test with answers" hosted on acouturelife.com, likely a lure to encourage clicks. While no scripts were directly extracted, the PDF structure and heuristic firings indicate malicious intent, possibly to redirect users to malicious content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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://acouturelife.com/uploads/1/3/0/6/130620345/130620345.html#sales+aptitude+test+with+answers
    • http://sirtrillmusic.com/uploads/1/3/0/3/130324419/8242544.pdf
    • http://harrogatemassage.com/uploads/1/3/1/4/131438353/kadureruvowobawoz.pdf
    • http://kimdonehower.com/uploads/1/3/1/0/131070688/9604381.pdf
    • http://sijmit.com/uploads/1/3/0/5/130543188/37915569cfbd9.pdf
    • http://chante-ishta.com/uploads/1/3/1/4/131437130/bafafosobabu_paludosafesuga.pdf
    • http://nayborjewels.com/uploads/1/3/0/5/130539114/pegigavekujapob.pdf
    • http://betterlifeonline4u.com/uploads/1/3/0/2/130289641/8195225.pdf
    • http://buttonprairiefarms.com/uploads/1/3/1/1/131163763/5ac9159b46e0.pdf
    • http://rockhammerhdd.us/uploads/1/3/0/5/130588693/42bf7ca1936635.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006202.bin
fc6afb78ba43cf6dd7e6b3e71236529d05c8c80f78d839fbc1bbf6e5149668e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6202 7860 bytes

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