Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbacd36ea854cd65…

MALICIOUS

PDF

45.5 KB Created: 2020-04-07 20:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 13685888befe222b87b16314924f36ed SHA-1: 2ee3ba463cb8ed4f68973253c91ad857f562bb4d SHA-256: bbacd36ea854cd65449ac94907c06edb44409ef00dd05351fd77ac51d2429ee6
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The document body, though partially corrupted, suggests a lure related to 'Comprobante de platicas para primera'. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm, indicating a likely attempt to drive traffic to potentially harmful content.

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://visionarycreations.net/uploads/1/3/0/5/130588686/130588686.html#comprobante+de+platicas+para+primera
    • http://thepaintersperspective.com/uploads/1/3/0/7/130776439/vomujuwovamumon.pdf
    • http://michaeljuliansongs.com/uploads/1/3/0/6/130621579/dolupej.pdf
    • http://mountainrosedeli.com/uploads/1/3/0/5/130589399/3066299.pdf
    • http://millrightsolutions.com/uploads/1/3/0/3/130323360/fef6e110b18792c.pdf
    • http://chefpapinyc.com/uploads/1/3/0/8/130814729/nosova_wijalilejaxu_liwenufi_zemamidupez.pdf
    • http://luigiconsultingllc.net/uploads/1/3/1/3/131384470/dulawumug-fukuviniwem.pdf
    • http://itsmconsulting.org/uploads/1/3/0/7/130776730/9e3a532.pdf
    • http://mzocalo.com/uploads/1/3/1/0/131071114/db36e4.pdf
    • http://supernaturaltransformation.org/uploads/1/3/0/6/130620878/pifaxida.pdf
    • http://vozclara.net/uploads/1/3/0/8/130814132/vajog.pdf
    • http://eagleeyesystems.org/uploads/1/3/0/7/130738822/relebukudibasewumup.pdf
    • http://mindsetapothecary.com/uploads/1/3/0/8/130873870/3746456.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_off0000860b.bin
9d512814207b71748b7a6cf0446113a34092d2715a69dc259b1b3a0a77ad9ba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x860B 9212 bytes

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