Malicious PDF — malware analysis report

Static analysis result for SHA-256 087d9b0b4ee48497…

MALICIOUS

PDF

34.6 KB Created: 2020-04-15 10:08:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0f206abf08241505b2ded206b4782c7a SHA-1: dcad73dd0a6f4b3122e07227ddb8b52897f405fb SHA-256: 087d9b0b4ee484971e99e8c48e5f11e4b6325c0c0556bcac471d819f8a88265c
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful content or manipulate search engine results. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous external URLs indicates a likely attempt to deliver a second-stage payload or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://garysstorage.com/uploads/1/3/0/6/130621125/130621125.html#adivasi+jhumur+song
    • http://tysconcessions.com/uploads/1/3/0/9/130969896/zuvita.pdf
    • http://textmvmt.com/uploads/1/3/0/3/130324248/8087002.pdf
    • http://dmcglobalministries.com/uploads/1/3/1/4/131406663/ba14aad801feca3.pdf
    • http://singletaryslogistics.com/uploads/1/3/0/4/130436049/gumegejipuwu.pdf
    • http://electricapiary.com/uploads/1/3/1/3/131379550/3261923.pdf
    • http://ashleymgomez.com/uploads/1/3/1/4/131452732/wuvibex.pdf
    • http://wellnesswithinpregnancy.com/uploads/1/3/0/2/130272443/rujivizunam_kefebet.pdf
    • http://staybalikpulau.com/uploads/1/3/0/4/130483767/741759.pdf
    • http://bbqbashproductions.com/uploads/1/3/0/6/130604475/lekosakiju_sulajizoxovapof.pdf
    • http://rayceramics.com/uploads/1/3/0/3/130323190/perufi.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_off0000622d.bin
a0685efb4f4d4984b8691b38c8cbe3f15618c1da75c401d97896f9c3d0e6614d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622D 7280 bytes

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