Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac8eb340dea8832…

MALICIOUS

PDF

39.8 KB Created: 2020-03-30 08:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d92572f35c72a324087bb96cffeb70fc SHA-1: 0cd2f9c3f04294ddaf5c1cd5d020b7d173506399 SHA-256: 1ac8eb340dea88321bee651f0fa3eee66ed1004a405bfced5c4e1153c50f0585
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body contains garbled text and what appears to be a reference to a 'Motorola bluetooth headset h700', possibly a lure. No scripts were extracted from this sample.

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://beingself-centered.com/uploads/1/3/1/4/131438299/131438299.html#motorola+bluetooth+headset+h700
    • http://northcolumbiaheights.org/uploads/1/3/0/3/130323612/texosol.pdf
    • http://unityofstockton.com/uploads/1/3/0/6/130620366/03faa56bf25.pdf
    • http://penseglobalajalocalminas.com/uploads/1/3/1/4/131406433/vegat_rafisatakus_zogebu_lujarike.pdf
    • http://www.prayinguponastar.com/uploads/1/3/0/7/130739127/dipofupevukex.pdf
    • http://capizomics.com/uploads/1/3/0/8/130814921/ef19723050.pdf
    • http://david-morris.net/uploads/1/3/0/7/130775980/256011.pdf
    • http://valanx.fr/uploads/1/3/0/5/130538981/1638079.pdf
    • http://aigprivatebank.org/uploads/1/3/0/6/130640057/c589e9eedd.pdf
    • http://capehydraulics.com/uploads/1/3/1/4/131438641/8425353.pdf
    • http://mariposaedibles.com/uploads/1/3/0/5/130590047/2515280.pdf
    • http://excelmarketing.ca/uploads/1/3/1/3/131380299/84e71894967.pdf
    • http://canadianextra.ca/uploads/1/3/0/6/130604369/1ddd53a4cf8f8f.pdf
    • http://seislagos.net/uploads/1/3/1/1/131163879/9245856.pdf
    • http://2111waukeganroad.com/uploads/1/3/0/5/130551859/80087.pdf
    • http://molivery.ee/uploads/1/3/0/6/130605176/9306613.pdf
    • http://consultoria-tecnologica-mexico.com/uploads/1/3/0/5/130544826/voselowegeforu.pdf
    • http://naturheilpraxis-neuhausen.de/uploads/1/3/0/9/130969938/3397582.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_off00006fed.bin
528d8f6842237144274bf7f42201ff17bdec4543c5cd8a947dc22c30fe681d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FED 9020 bytes

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