Malicious PDF — malware analysis report

Static analysis result for SHA-256 468c2e64e3dbed2c…

MALICIOUS

PDF

35.9 KB Created: 2020-04-10 05:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: b5e0fe74ee797b163b8ee431ecf89294 SHA-1: 1031fc52bc525a4e99a458e82e6654402b0a16d6 SHA-256: 468c2e64e3dbed2c2f9538ec0cd0394793704de47c40941385b68da617bb8d21
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains multiple embedded URLs, with one specifically highlighted by heuristics. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains references to the primary malicious URL, suggesting a lure to external content. No scripts were extracted, limiting the analysis of specific execution behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://affordablegeneralcontractorvirginia.com/uploads/1/3/0/5/130550985/130550985.html#formato+para+place+de+la+secretaria+de+salud PDF link annotation
    • http://hinterlife.net/uploads/1/3/0/5/130550868/kebafapimutojekavom.pdfIn PDF document text
    • http://nativehomeware.com/uploads/1/3/0/7/130739750/2977415.pdfIn PDF document text
    • http://smashinit402.org/uploads/1/3/0/4/130483402/zijirabadaseda-woner-bopoxo-kinanip.pdfIn PDF document text
    • http://dippedarmor.com/uploads/1/3/1/4/131482954/3161489.pdfIn PDF document text
    • http://outofthisworldapparel.net/uploads/1/3/1/4/131406739/0bb5a323ff81050.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_off000062b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 8292 bytes
SHA-256: f7073f6b37e9f045952ae8687503707de47ccc31c12b0caa8aea0d3856aa7aec

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